History HalfHumanHybrid / Literature

** The ''Legends'' continuity is filled with hybrids, due to the large number of "[[HumanAliens Near-Human]]" races, which aren't so much alien species as subspecies of humanity that descended from early space explorers who were cut off from the original human homeworlds thousands of years earlier, only to be rediscovered later. How far they diverge from regular humans varies; some just have [[GreenSkinnedSpaceBabe different skin colors]], while others have more extreme differences (the Miraluka, for example, have no eyes and see using TheForce instead). On the other hand, species that ''aren't'' Near-Humans explicitly cannot interbreed with humans, no matter how human-like they appear to be... At least, this was initially true, as additions to the lore [[ContinuitySnarl rendered the Near-Human argument moot]] as not only Near-Humans can interbreed with humans but also species like the Twi'lek, who aren't said to be Near-Human (although given they're pretty similar to humans aside from head tails, it could have been done).

* In ''Literature/MermaidsOfErianaKwai'', the tyrannical merman king Adaro is the product of a fling between Queen Medusa of the Atlantic and a human man who stopped seeing her as soon as he found out she was pregnant. Adaro's heritage makes him the only merperson immune to ColdIron, but it also causes him to transform into a human during king tides, forcing him to hide out on land until he transforms back. When he was an adolescent, he searched unsuccessfully for his father, and was captured and tortured by fishermen, providing the FreudianExcuse for his hatred of humans. He founded his own kingdom because he felt his mother's policies were too friendly to humans.[[spoiler:Meela eventually finds and kills him while he's in his vulnerable human form.]]

** A few comments are made about people being part [[AllTrollsAreDifferent troll]], but given the context (Ron in regard to some Snatchers, Harry about Marcus Flint), it's obviously just meant as an insult, although part-trolls could still exist.

* In ''Literature/MostlyHarmless'', Trillian vaguely assumed her daughter, created through in-vitro fertilisation, was this. It later occured to her how unlikely that was, and she realised the father must be Arthur.

* When the {{Evilutionary Biologist}}s in ''Literature/TheMoreauFactor'' crack the secret of ForcedTransformation, what's the first thing they do? Why, turn their lab staff into sexy Half-Human Hybrids, of course. This being a Creator/JackChalker novel, the new designs combine roughly equal measures of utilitarianism and fanservice; unlike most of Chalker's books, the fetish aspects are {{justified|Trope}} as being caused by the effect of the PowerPerversionPotential on the scientists.

* In ''Literature/{{Dragonvarld}}'', Vengeance is roughly human-shaped but has scaled legs and clawed feet like a dragon, reflecting his father. It nearly gets him killed as a baby, since the midwife [[TorchesAndPitchforks raises an angry mob]].

* The titular character of ''Olive Kennedy, Fairy World M.D.'' is half-elf on her father's side.

* In Eric Nylund's ''A Pawn's Dream'', all the Dreamers are half (or less) human, as a child born of two Dreamers is incredibly powerful and therefore forbidden, as it would disrupt the balance of power. In this case the intermarrying isn't very far-fetched, as the only differences from regular humans are the existence in both worlds and the ability to use magic.

* In ''The Sky Village'', Mei/Dragonfly and Rom/Breaker are ''tri-''human hybrids because they carry the "kaimira gene", which gives them beast (animal), human, and "mek" (robot) DNA.

* {{Subverted|Trope}} (and {{deconstructed|Trope}}) by way of BodyHorror in Mickey Zucker Reichert and Jennifer Wingert's ''Spirit Fox''. The heroine is usually a human woman [[FantasticFoxes possessed by the spirit of a now-dead fox]]; she sometimes shapeshifts involuntarily into fox form. During one of these shapeshifted blackouts, she's impregnated by a male fox. She later suffers a miscarriage because her grotesquely malformed half-human, half-fox twin fetuses are not viable.

* Creator/IsaacAsimov's ''Tweenies'' short stories features Martian-Human hybrids. Their most noticeable features are large white mohican crests and high intelligence. They are outcasts of both species. In the stories a sympathetic human ends up looking after several Tweenies, later becoming a small commune. Once older, they leave Earth to have adventures colonizing Venus.

* In V. Zykov's ''Way Home'', elves are cross-fertile with humans, and half-elves are somewhat bound to elven laws.

** The ''Bedlam's Bard'' series by Lackey and varying co-authors has half-human, half-elven characters, but also states that the species are not cross-fertile unless deliberate actions are taken to make them so. One plotline in one of the books is Beth and Kory searching for a means to accomplish this without resorting to the means used by Perenor to father Ria (which involved forcibly draining other humans of magic, with frequently lethal consequences).

** An early modern version comes from ''The Three Imposters'' with [[spoiler:the boy Jervase Cradock, who is part [[TheFairFolk fae]]]].

* The {{Nephilim}} of ''Angelology'' who are descended from {{Fallen Angel}}s called Watchers. They look like tall, pale and beautiful humans, have lifespans measured in centuries and have wings like their fathers. They also have a warrior caste called Gibborim who are pure white with red eyes but red wings which they can use to [[PlayingWithFire create an incendiary wind]].

* One of the protagonists of one of the first science-fiction novels, ''Auf zwei Planeten'' (''On Two Planets'', 1897) by Creator/KurdLasswitz, is Friedrich Ell, the son of a Martian explorer stranded on Earth (his spaceship crash-landed in Antarctica) and a German governess living with a family in Australia.

* {{Discussed|Trope}} in Robert J. Sawyers' ''Calculating God'' when Tom Jericho shows ''Franchise/StarTrek'' to StarfishAliens. [[spoiler:The book itself ends with the creation of a three-species human/alien/alien hybrid via divine technology.]]

* ''A Different Flesh'' by Creator/HarryTurtledove takes place in a world where homo erectus are the indigenous people of the Western Hemisphere. In one chapter, a human man impregnates a homo erectus woman.

* In Creator/DavidEddings' series ''The Dreamers'', That-Called-the-Vlagh (or just the Vlagh) is a giant female insect who creates thousands and thousands of eggs, and whenever she sees a characteristic she likes, she mixes and matches animals with the characteristics she likes... creating the craziest creatures ever. But very, very, deadly.

* Human/fairy hybrids appear prominently in ''Goblin Moon'' and ''The Gnome's Engine''. They are prone to psychological instability and have unique responses to emotional stress, a fact which is central to the plot. A mixed dwarf/human marriage is also mentioned, although it's unstated whether children are expected to follow.

* In Aleksandr Zarevin's ''The Lonely Gods of the Universe'', many humans are descended from a mix of the original humans and HumanAliens from the planet Oll (who [[GodGuise pretended to be Greco-Roman gods]]). Unlike their non-human ancestors, the hybrids are not immortal (the immortality is not due to genetics, though, but due to consuming an alien plant named Ambrosia that gained different properties on Earth). The only thing that appears to be the result of these interbreedings is humans having different hair colors (apparently, original humans all had dark hair), thanks to the Ollans being redheads.

* The German booklet series ''Maddrax'' has the mendrites, who are hybrids of humans and [[FishPeople hydrites]]. They have gray skin, similar to that of a dolphin, and pointed ears, sharp teeth, as well as claws and swimming-skins on the fingers and toes. In the beginning, there are only single mendrites, who are usually neither welcome either among hydrites or among humans [[HalfBreedDiscrimination because of their nature]]. Later, however, there is a city where humans, hydrites and mendrites live together and have [[UnevenHybrid common offspring]].

* ''Literature/{{Next}}'' has Dave, the son of a researcher who manipulated his DNA and a chimpanzee's donated cells. He displays both human and monkey aspects, especially in personality, as he ''flings poo.'' It's also implied that he's aging rapidly, in line with the book's theme of genetic engineering gone insane and people never expecting problems with their newfangled tech.

* ''Literature/TheSyrenaLegacy'': Emma looks like a human aside from her purple eyes, which are a trait of Syrena. When she's eighteen, she develops abilities that include holding her breath for superhuman lengths of time and [[TheBeastmaster talking to fish]]. Dr. Milligan runs some tests and X-rays on her and finds that her heart rate and bone structure are halfway between that of a human and a Syrena. He concludes that she must be a hybrid, even though it's strictly forbidden for Syrena to mate with humans. Genetic tests confirm that half her DNA comes from each species. [[spoiler:It turns out Emma's mother is the long-lost Syrena princess Nalia.]]

* Gwynn Ella Ashbow from the ''Inferno'' series is a half-elf, apparently the last one in her village. She identifies more with her human father and is emphatic that she be referred to as human. It seems that she [[HybridPower might be able to do some things better]] than either humans or elves.
* In Kit Whitfield's ''In Great Waters'', all the royal houses of Europe (except Switzerland, which is landlocked) have [[OurMermaidsAreDifferent Deepman]] blood. Any hybrid not of royal blood is termed a Bastard and summarily executed, usually by burning. All hybrids have small, needle-like teeth, black eyes with no white, clawed and webbed fingers and "legs" that are actually bifurcated tails which force them to use canes to walk. Because of inbreeding royals sometimes exhibit other Deepman traits like bioluminescent blue skin (rare even among Deepmen) like Anne or tails that are whole down to the knees like Philip.
* ''Invisible Beasts'' by Sharona Muir is a [[MonsterCompendium field guide of beasts]] unseen to almost all humans. One entry is the pluricorn, a quadriped beast that has coexisted with humans since the beginning. Pluricorns have many winding horns and males use these to battle each other for mates. While the males are buys battling, bored females will sometimes go out to entice a horny human man with a sultry wink and turn of the hindquarters as depicted in ancient cave artwork. The result is after a mating battle, the child of the winner and his supposed mate just might have a lot of human DNA in it.

* In Creator/KWJeter's ''Infernal Devices'', the village of Dampford is populated by inbred denizens who have rather "piscine" features. With their bulging, protuberant eyes and fishy faces and low intellect, the Dampforders find that their daughters are often conned into being taken to London where they're made into "green girls", grotesque prostitutes for jaded rich men. The source of their Dampford's odd looks, they're half Selkie. When the Brown Leather Man, [[LastOfHisKind last of the full-blooded Selkies]], goes to see if the Dampforders can be used to bring back the race, he finds that their bloodline is so degenerate that the only result is a sickly sludge.

** The ''Legends'' continuity is filled with hybrids, due to the large number of "[[HumanAliens Near-Human]]" races, which aren't so much alien species as subspecies of humanity that descended from early space explorers who were cut off from the original human homeworlds thousands of years earlier, only to be rediscovered later. How far they diverge from regular humans varies; some just have [[GreenSkinnedSpaceBabe different skin colors]], while others have more extreme differences (the Miraluka, for example, have no eyes and see using TheForce instead). On the other hand, species that ''aren't'' Near-Humans explicitly cannot interbreed with humans, no matter how human-like they appear to be... At least, this was initially true, as additions to the lore [[ContinuitySnarl rendered the Near-Human argument moot]] as not only Near-Humans can interbreed with humans but also species like Zabrak and Twi'lek, who aren't said to be Near-Human (although given they're pretty similar to humans aside from small horns or head tails, it could have been done).

* ''Literature/AmericanGods'': Shadow is the son of [[spoiler:[[SemiDivine the god]] Odin]] and a mortal woman. Similarly, Charlie and Spider from ''Literature/AnansiBoys'' are the sons of the spider god Anansi and a mortal mother.
* ''Literature/{{Animorphs}}'': [[spoiler:Tobias']] father was an Andalite (specifically [[spoiler:Elfangor]]) {{Shapeshifter Mode Lock}}ed in human form. While this would seem to make him all human, in the book ''The Illusion'', he is able to see a GeneticMemory of his father, which Andalite legend says can happen when one is near death. This could be a side effect of having acquired Andalite DNA from [[spoiler:his uncle, Ax]], in the same book.
* ''Literature/Area51'': The Ones Who Wait are {{artificial humans}} created to serve Artad, with some DNA from his Airlia species in the mix. Usually, the only sign is having [[RedEyesTakeWarning red eyes]], which they cover by contact lenses.
* ''Literature/ArtemisFowl'': Played with. In ''The Lost Colony'', Artemis (human) and Holly (elf) accidentally switch out an eye due to time travel shenanigans. In ''The Last Guardian'', [[spoiler:Artemis gets trapped in the center of a spell that's set to kill all fairies in range, but is harmless to humans. However, because Artemis has a fairy eye, the field sees him as fairy and ends up killing him]]. This event classifies both Artemis and Holly as this trope.
* ''Literature/{{Alterien}}'': The children the Alteriens have with humans are half human/Alterien hybrids. Ara, Lyra and Li'nia are also hybrids, though they are half human, half Shanda'ryn.
* ''Literature/AuroraCycle'': It is revealed in the second book that [[spoiler:Tyler and Scarlett Jones are half-Syldrathi, though they appear fully human.]]
* ''Literature/BlackDogs'': Humans seem to be able to hybridize with almost anything, from the plausible elves, FridgeLogic dragons and ''demons'' that vary wildly and possess more random body parts in otherworldly dimensions than you can shake a stick at. A couple of these hybrids are even main characters.
* ''Literature/AChorusOfDragons'': Most of the humanoid races are cross-fertile with one another, and while hybrids are relatively rare they're common enough to be seen as little more than mildly exotic in most situations. Among other characters, Thurvishar is half human and half vordreth, while [[spoiler:Kihrin]] is half human and half vané.
* ''Literature/TheChroniclesOfNarnia'':
** Caspian's tutor, Dr. Cornelius, in ''Literature/PrinceCaspian'' is secretly part dwarf, and it's implied that Caspian's childhood nurse is also descended from dwarfs who'd avoided Telmarine pogroms by passing themselves off as short humans. Caspian's own son is half ''star'', stars being glowing humanoid beings in the world of Narnia. Furthermore, ''Literature/TheMagiciansNephew'' states that the children of Narnia's first human king and queen married wood-nymphs and river-spirits.
** In ''The Magician's Nephew'', we also learn that the White Witch--and indeed, all people of Charn--are part giant. But Subverted in Jadis/the White Witch's case, as she only ''pretended'' to be part human to assert her claim to the throne. Her non-giant blood is actually ''genie'' (jinn), not human.
* In Richard Ellis Preston Jr.'s ''Literature/ChroniclesOfThePneumaticZeppelin'', Max and her brother are half human, half "Martian". (The aliens definitely come from much farther away than Mars, but the name stuck.)
* ''Literature/{{Darkover}}'': Creator/MarionZimmerBradley's ''The World Wreckers'' includes a romance and eventually a child between a human and an alien chieri (one of a race of SpaceElves). It's explicit in a number of the books that the Chieri and humans have been interbreeding infrequently for a long time now. In fact, the breeding program that created powerful psychics as well as leaving the nobility inbred with a number of "lethal recessives" was brought about to strengthen the psychic gifts inherited from the Chieri. Also, a number of Chieri features show up now and then in the noble families, particularly the ruling Hastur, including abnormally long life, tall slim builds, six fingered hands, and low fertility rates, even compared to the already low norm.
* In ''Literature/TheDarkProfitSaga'', humans are the "default" for the races of Man capable of interbreeding (elves, gnomes, and sten). Any Union between these produces humans, which is how humans came to be and why they now make up the majority of the races of Man. First-generation humans can frequently be distinguished by their heterochromia.
* [[spoiler:Mordred]] in the [[Literature/TheWindThroughTheKeyhole final volume]] of Stephen King's ''Franchise/TheDarkTower'' is the child of [[spoiler:two full-blooded humans, one demon elemental who was turned human by {{Magitek}}, and one PhysicalGod who had at least one human ancestor and may be as much as half-human.]] ItsALongStory.
** Also in ''Franchise/TheDarkTower'' series, the Can-Toi, or the "low men" are half-human, half-taheen.

** Justified in ''Literature/DarkLordOfDerkholm'' in which Derk is a magician specialising in genetics and creates griffin children using his and his wife's DNA as well as cat and eagle DNA. However, it is implied that Derk's griffin children will have no problem having children with the "real" griffins that turn up in the second book (well... their Dad can help them out).
** In ''Literature/DeepSecret'' a couple of [[spoiler:centaur]] characters have human fathers. It's pointed out that it has to be that way round because a hybrid foetus would be too big for a human woman to carry.

* ''[[Creator/HarryTurtledove A Different Flesh]]'' takes place in a world where homo erectus are the indigenous people of the Western Hemisphere. In one chapter, a human man impregnates a homo erectus woman.
* The Literature/{{Dragonlance}} series of books started the original Chronicles Trilogy off with one of the main characters as a half-elf, the conflicting emotions he felt stemmed from the mixture of his two races and serves as the character's main plot for most of the books; his name Tanis [[ExactlyWhatItSaysOnTheTin Half-Elven]].
** Played doubly straight. "Among the Elves... I am Half-Man."
%%* [[OurDragonsAreDifferent Anthrozils]] in ''Literature/DragonsInOurMidst''.%%ZCE
* In Creator/DavidEddings's ''The Dreamers'' series, That-Called-the-Vlagh (or just The Vlagh) is a giant female insect who creates thousands and thousands of eggs, and whenever she sees a characteristic she likes, she mixes and matches animals with the characteristics she likes... creating the craziest creatures ever. But very, very, deadly.
* ''Literature/TheDresdenFiles'' has a couple of variants on these.
** There are changelings, who are the scions of humans and one type or another of the Fae. Outwardly, they look human, but as they grow older they take on characteristics of their Fae side; for example, a scion of a human and a troll would become large and brutish and with odd-colored hair. Eventually, the changeling has to "Choose" whether to embrace their faerie heritage and become a full-blooded faerie, or to remain human and lose the faerie powers.
** Jared "The Hellhound" Kincaid, a centuries-old hitman who is the scion of a human and something from [[{{Hell}} Down Below]].
** Thomas Raith, who's the son of the King of the White Court of Vampires and [[spoiler:a human wizard called Margaret [=LeFay=] Dresden, making him Harry's older half-brother]]. It's implied that most if not all White Court vampires are the offspring of a human/White mating.
** Even Harry's dog Mouse gets in on the action, since he is a Fu Dog, scion of a Tibetan Mastiff and a canine guardian spirit.
* In Clan of the Cave Bear from the ''Literature/EarthsChildren'' series, [[spoiler:Ayla is raped by Broud and their son Durc is half Cro-Magnon and half Neanderthal.]]
* ''Literature/TheEmpiriumTrilogy'': Marques are beings that are half-human and half-angel. They're born with wings, but because of the prosecution against them, their wings are usually cut off.
* In ''Literature/HarryPotter'', they're generally treated with a lot of prejudice from much of the wizarding world.
** Hagrid had a human father and a giant mother. Madame Maxime is also at least part-giant, but trying to pass as "pure human." Both are gigantic in human terms, but utterly tiny in giant terms.
** Fleur Delacour is a quarter Veela. She doesn't inherit their ability to transform into birds, but does inherit the natural charm that makes men attracted to her. [[spoiler:She eventually has three children with Bill Weasley who are 1/8 Veela. One of them is a boy, which is interesting, because [[OneGenderRace Veela are exclusively women]].]]
** A few comments are made about people being part troll, but given the context (Ron in regards to some Snatchers, Harry about Marcus Flint) it's obviously just meant as an insult, although part trolls could still exist.
** Professor Flitwick is "human with a dash of goblin," according to WordOfGod. Though that's more like "remote goblin ancestor." In the movie it's much more obvious, largely because [[ActingForTwo the same actor plays several of the goblins]].
** In the seventh book, Remus Lupin and Nymphadora Tonks conceive a son, Teddy, who is half-werewolf and half-metamorphmagus (natural shapeshifters). One of Lupin's insecurities is having his lycanthrophy passed to his son, because of the stigma werewolves receive from wizarding society. Teddy ends up being a metamorphmagus only, however.
* Averted in Creator/PoulAnderson's short story, ''Literature/TheHighCrusade'', which includes an instance of the humans finding one or more [[GreenSkinnedSpaceBabe green-haired, feathery-antennae'd space babes]]. In the words of the narrator, "Nor was there any possibility of issue between [the Space Babe's] species and our own." Nevertheless, he indicates that the complications didn't stand in the way of InterspeciesRomance... though being a priest, he does worry that "the prohibitions of Leviticus might apply," i.e. that it counts as the sin of beastality.

** The inhabitants of the eponymous town in "Literature/TheShadowOverInnsmouth" are the result of interbreeding with FishPeople.
** In "Literature/TheDunwichHorror," Wilbur Whateley and his brother are the offspring of a human woman and an EldritchAbomination.

** This is one possible explanation for Brown Jenkin in "The Dreams in the Witch House", a ratlike creature with a human face.
** Wilbur Whateley in Literature/TheDunwichHorror, who, under his roomy clothes, was equal parts giant anthropomorphic goat and and HumanoidAbomination. He wasn't nearly as strange as the Horror, which was a large, invisible monster, when revealed was a mass of tentacles in the shape of an egg, inhuman mouths and eyes everywhere and a humanoid face on top. The twist at the end, [[LateArrivalSpoiler if you'll forgive the spoiler]], was that Wilbur and the Horror were fraternal twins, with the Horror simply resembling their father Yog Sothoth more than Wilbur did.
* In Creator/KWJeter's ''Infernal Devices'', the village of Dampford is populated by inbred denizens who have rather "piscine" features. With their bulging, protuberant eyes and fishy faces and low intellect, the Dampforders find that their daughters are often conned into being taken to London where they're made into "green girls", grotesque prostitutes for jaded rich men. The source of their Dampford's odd looks, they're half Selkie. When [[LastOfHisKind the Brown Leather Man]], last of the full-blooded Selkies, goes to see if the Dampforders can be used to bring back the race, he finds that their bloodline is so degenerate that the only result is a sickly sludge.
* In Creator/PatriciaBriggs's ''Hurog'' novels, half the cast have a dragon ancestor several generations back. ([[spoiler:Dragons can assume human form.]]) There is also [[spoiler:Axiel, who is half-dwarf. And his claim to be the dwarf king's son is actually true.]]
* Literature/JohnCarterOfMars, the hero of Creator/EdgarRiceBurroughs's ''A Princess of Mars'' and subsequent books, had two children with Dejah Thoris, a red Martian princess. Martians lay eggs. Go figure. Then again, John Carter may not be human; he says he is very old and can recall no childhood. There is no mention of the other human/Martian couple in the series (Ulysses Paxton/Valla Dia) having children. The whole thing's made even stranger because it's strongly implied the various Barsoomian HumanAliens can't even fully interbreed with ''each other''; In ''The Gods Of Mars'' the White Martians try to expand their gene pool with outbreeding, and get a bunch of pitiful monstrosities that are kept hidden away.
* In ''Literature/LoyalEnemies'', humans can have children with elves. Among named characters, LittleMissBadass Virra and [[TheBard Bard]] Hraik are half-elves. There's a strange tradition in mixed human-elf marriages where the elf among the parents always names the resulting child by deciding whether it looks/feels more like a human or an elf. This resulted in the sisters Danka and Virra, who have the same parents, receiving a human and an elven name, respectively.
* Creator/PiersAnthony's works.
** Literature/{{Xanth}} series, filled with InterspeciesRomance (including much LovePotion-induced romance) as it is, has a number of {{Half Human Hybrid}}s; such hybrids are ''always'' fertile, and in some cases entire new races are created this way. It can be taken to ridiculous extents, such as a character who is 1/2 brassy 1/4 human 1/8 ogre and 1/8 nymph.\\
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In cases where the two species involved are otherwise physically... ''incompatible'', love springs have an inherent magic that overrules the laws of biology, allowing for even more bizarre blendings. When the two species are simply too different to coexist in a single form, they become were-creatures, able to transform from the one species to the other.
** In the ''Literature/ApprenticeAdept'' series, such hybrids were thought to be impossible. Right up until someone thought to check [[BigBookOfEverything the Book of Magic]] for a solution. A fertility ritual was found[[note]]The couple has to mate in each of their separate forms, for an entire day in each, necessitating the intervention of an Adept to transform one or both parties[[/note]] and along comes the half-human/half-unicorn Flach. And later, the half-troll/half-vampire, Al.
* Saaski, the protagonist of the Newbery Medal-winning novel ''Literature/TheMoorchild'' is born among the Folk, which are the traditional Northern European idea of fairies (i.e., pagan spirits of nature, fond of music and games, and completely amoral as long as something looks to be fun). However, she is actually the hybrid child of a Folk woman and a human man who wandered into their domain. As she's unable to exercise all the powers of the Folk, and seen as a danger to them, the Prince declares she must be sent out among the humans as a changeling child. Naturally, she doesn't fit in there either, as the humans fear and hate her, and she retains a terror of everyday features of human life like crosses, yellow flowers, salt, and iron (particularly unfortunate as her "adoptive" father is a blacksmith).
* In Creator/WilliamHopeHodgson's ''Literature/TheNightLand'', the Giants are an extremely unpleasant example, "fathered of bestial humans and mothered of monsters." While generally humanoid in form, they're hideous, squat, furry, warty, and ''bigger than elephants''.
* ''Literature/OliverTwisted'': Toby Crackit is half-swamp goblin from his mother's side, and inherited her tentacles. He appears as a small man with a hunched back, because he keeps his tentacles hidden in the back of his coat.
* Damsel of Austin Grossman's ''Literature/SoonIWillBeInvincible'' is not the actual child, but the genetic combination of her father's DNA and that of the GreenSkinnedSpaceBabe he fell in love with. This is actually addressed with Damsel confessing that the combination isn't stable and she is constantly sick because of it.
* An early modern version is [[spoiler:the boy Jervase Cradock, who is part FairFolk]] in ''The Three Imposters'' by Creator/ArthurMachen.
* In ''Literature/TheThreeWorldsCycle'' books by Ian Irvine there are four humanoid species: Charon, Faellem, Aachim and old human. Those with ancestry from two of the above are blendings, three makes a triune and four makes a tetrach. This may be slightly played with as the books state that many hybrids are sterile, have a short lifespan and various mental and physical problems, these worsening the more "mixed" the blood is.\\
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Also, at least some of these human species are directly derived from others. While it's likely there'd been enough genetic drift to make separate species, it's possible that at least a couple of these races are in fact from the same species. There are other non-human species in the series, but no-one's particularly keen to mate with them to see what happens.
* In Creator/RobertBloch's Franchise/CthulhuMythos story "The Brood of Bubastis", he takes this trope up to eleven, with an ancient Egyptian cult that'd managed to bring their animal-headed deities into being ''in the flesh'', [[BestialityIsDepraved by quite primitive methods]].
* Averted entirely in Creator/AnneMcCaffrey's ''Freedom's Landing'' series. There's only one species humanoid enough to be attractive to humans, and it's outright stated that they can't have children together. The children the heroine and her love have are from affairs on her part and a previous marriage on his, both with their own species.
* In ''Literature/UnLunDun'' by Creator/ChinaMieville, the character Hemi is half ghost, half human. It's implied that it's extremely rare, and frowned upon by ghosts and humans, for such a pairing to occur.
* In Eric Nylund's ''A Pawn's Dream'', all the Dreamers are half (or less) human, as a child born of two Dreamers is incredibly powerful and therefore forbidden, as it would disrupt the balance of power. In this case the intermarrying isn't very far fetched, as the only differences from regular humans are the existence in both worlds and the ability to use magic.
* In Creator/TamoraPierce's ''[[Literature/TortallUniverse Wild Magic]]'', Daine Sarrasri is the child of a human woman (Sarra -- thus the name) and the god of the hunt (Weiryn). Her mother later becomes a goddess in her own right (The Green Lady). Aly and Nawat's baby from the Trickster books also counts, being half-human and half-crow.
* [[LampshadeHanging Lampshaded]] in Creator/HBeamPiper's short story "When in the Course". One human female character is reminded several times throughout the story that, even though the inhabitants of Freya appear human, the two races "started in two different puddles of living slime, seven hundred light-years apart". At the end of the story, she announces that she's pregnant by a Freyan.
* Played with in Brian Ruckley's ''Literature/TheGodlessWorldTrilogy''. The world in question contains 4 sentient species (previously 5, before the [[OurWerewolvesAreDifferent werewolf race]] got wiped out). Of these only two are humanoid, the Huanin (humans) and Kyrinin (elves, but not as long-lived, wise or peaceful as elves tend to be.). The two races can interbreed, but the offspring, called Na'Kyrim, are always sterile and generally conform to real-life hybridization in terms of appearance and shared traits. They also develop a form of magic, known as the "Shared", which [[spoiler:given the primary way to become a powerful user of it, tends to cause a great deal of mistrust in the average person. By the way things are looking by the end of the second book, they are very, very justified.]]
* In Christopher Stasheff's ''Literature/WarlockOfGramarye'' books, Gwendylon Gallowglass of Gramarye is one-quarter elven (and her children are one-eighth). This is weirder than usual, because on Gramarye elves were originally an alien fungus [[ClapYourHandsIfYouBelieve shaped by the beliefs]] of humans with PsychicPowers.
* In Franchise/TolkiensLegendarium (''Literature/TheSilmarillion'', ''Literature/TheLordOfTheRings'', etc.) there are a few human/elf children. [[WordOfGod In one of his letters, Tolkien said]] that biologically, humans and elves are the same species (though they are spiritually different), which is why they can interbreed; since orcs are presumed to be degraded creatures originally bred from corrupted elves and/or humans, they would be able to interbreed with us as well.
** The most famous Half-Elven family (descending from two separate mixed marriages, whose members married each other) that descended from Lúthien, Beren, and Eärendil. The early members of that family each had to make a choice to be counted among either Elves or Men, because elves and humans have incompatible afterlives for cosmic reasons. Not all members of that family chose the same, causing a lot of grief for them whenever close relatives were separated by the afterlife ''for all time''.
*** As a further bit, this choice isn't binding on your descendants for the Half-Elven side. In the contemporary setting, the Half-Elven (mostly Elrond and the Rivendell folks) can choose to "opt out" of the Elven immortality and afterlife and instead take the Gift of Man (death). Arwen eventually chose this path to marry Aragorn and eventually dies a mortal death.
** Half Orcs exist, serving as spies or saboteurs for Saruman. Unpublished material described them as the offspring of orcs and humans reduced to an orc-like state. The Uruk-hai are also speculated to be bred by Saruman from orc-human matings.
** Some of the men among the Haradrim's forces are described as being "like half-trolls." It's unknown if they are actually this, but some of the video games depict them as genuine.
** At least one Man outside the Númenórean royal line mentioned above, Prince Imrahil, has Elven blood.
*** Although Prince's Imrahil's ancestry is largely debated, as one of the stories claim his ancestor was Nimrodel (beloved of Amroth) or one of her travelling companions, that after marrying and having children with a Númenorean, slipped out into the night never to be seen again--going strictly against Elven culture (leaving one's family). It is likely that the mention by Legolas in Return of the King was an oversight.
** The half-Elven unions and offsprings mentioned in ''Literature/TheSilmarillion'' and ''Literature/TheLordOfTheRings'' involve (on the elven side) descendants of Elu Thingol, a Sindarin elf and Melian, a [[OurAngelsAreDifferent Maia]] giving them all some DivineParentage. Early notes on the story indicate that Tolkien originally assumed that being half-elven was not unusual, but no other ever appeared in his work.
* Nahlia Cole in ''Literature/TheLostRedeemer'' is half-human, half-Aeon.
* Gwynn Ella Ashbow from the ''Inferno'' series is a half-elf, apparently the last one in her village. She identifies more with her human father and is emphatic that she be referred to as human. It seems she [[HybridPower might be able to do some things better]] than either humans or elves.
* S.L. Viehl is fond of this trope. Humans can interbreed with all kinds of freaky aliens—from [[GreenSkinnedSpaceBabe blue-skinned humanoids]], to avians, to something that [[StarfishAliens looks like a human-sized three-way hybrid of a mudpuppy, a catfish, and a lamprey]]. The [[NonhumanHumanoidHybrid aforementioned blue people seem to be able to hybridize]] with even ''more'' races... including some that are ''really'' bizarre.
* In David Weber's [[Literature/TheWarGods Bahzell stories]], humans have split into 5 separate species, Humans, Elves, Dwarves, Hradani, and Halfings. It is possible for any of the species to interbreed although only Elf-Human hybrids (Half-Elves) are common--several of the other matches produce offspring that die young or are infertile, although most of the human population of the Axeman Empire have some Dwarf blood. Half-Elves consider themselves to be the fifth species (since they came about before Halflings); however while breeding with each other and with full Elves preserves both the Human and Elvish traits, the offspring of a Human and Half-Elf will show a significant reduction in the Elvish traits. Finally it is established that only Humans and Half-Humans can be wizards or magi.
* The Venn family in ''Literature/ObsidianMirror'' is rumored to be half-Fae. The truth is a little more complicated. [[spoiler:One of Oberon Venn's distant ancestors spent a night in the enchanted woods, where he made a deal with [[GodSaveUsFromTheQueen Summer]]. In exchange for what he was given, one of his descendents would one day choose to enter the Summerland and stay there.]]
* Used early on but mostly averted in ''Franchise/StarWarsLegends''. Two unconnected characters are said to be "hybrids", and it's never explained exactly what species they're hybrids of. Since a lot of different species are related--humanity, for instance, has a long list of "near-humans", offshoots that can in some cases look very unusual--these hybrids might well be more plausible than some of the others on this page. There are also enough mentions of bio-engineering that some species might well be able to make a hybrid. However, in the few examples of InterspeciesRomance, it's generally proven true that "the parts match up just fine, but that's about it", as [[Literature/XWingSeries Gavin]] says of Asyr.
** Boba Fett married a Mandalorian kiffar woman named Sintas Vell. Together with her he had a daughter named Ailyn, who was a half-kiffar. This daughter married a human, and with him had a daughter named Mirta Gev, who was a quarter kiffar and three quarters human. Sintas, Ailyn and Mirta were [[DarkActionGirl head-hunters]]. Kiffar are Near-Humans though (see below) so it's not as surprising they could interbreed.
** In the ''Literature/XWingSeries'', a minor villain named Zekka Thyne is described as a halfbreed. It's never said what he is besides human, but he's got several {{Red Right Hand}}s, namely very mottled skin, pointed teeth, and HellishPupils that catch the light.
** ''Literature/TheHanSoloTrilogy'': Shug Nix is the son of a Human father and mother who is from another species. Han can tell right away from his looks, though they're not ''that'' different from a full Human. Shug admits to Han that he's not wholly of either species and is relieved when Han's okay with that, as because of [[FantasticRacism anti-alien bigotry]] in the Empire, people with mixed ancestry like his [[HalfBreedDiscrimination often suffer as well]].
** The ''Legends'' continuity is filled with hybrids, due to the large number of "[[HumanAliens Near-Human]]" races, which aren't so much alien species as subspecies of humanity that descended from early space explorers who were cut off from the original human homeworlds thousands of years earlier, only to be rediscovered later. How far they diverge from regular humans varies; some just have [[GreenSkinnedSpaceBabe different skin colors]], while others have more extreme differences (the Miraluka, for example, have no eyes and see using TheForce instead). On the other hand, species that ''aren't'' Near-Humans explicitly cannot interbreed with humans, no matter how human-like they appear to be... At least, this was initially true, as additions to the lore [[ContinuitySnarl rendered the Near-Human argument moot]] as not only Near-Humans can interbreed with humans but also species like Zabrak and Twi'lek, who aren't said to be Near-Human (although given they're pretty similar to humans aside from small horns or head tails, it could have been done).
* Hybrids ("breeds") are so common in Glen Cook's ''Literature/GarrettPI'' fantasy series, they sometimes outnumber the human characters. Exempting non-humans from military conscription, then inviting them in to work while your human subjects are off fighting a hundred-year war, can have unintended consequences...

* Averted in Creator/NeilGaiman's ''Literature/{{Stardust}}'', as Tristran and Yvaine get married despite their inability to interbreed.
** A straight example would be [[spoiler:Tristran himself, as his father was mortal and his mother was a fairy.]]
** The FilmOfTheBook, however, ends with mention of Tristan (different spelling) and Yvaine's children and grandchildren.
* When the [[EvilutionaryBiologist Evilutionary Biologists]] in Creator/JackChalker's ''Literature/TheMoreauFactor'' crack the secret of ForcedTransformation, what's the first thing they do? Turn their lab staff into sexy {{Half Human Hybrid}}s. Being Chalker, the new designs combine roughly equal measures of utilitarianism and fanservice; unlike most Chalker the fetish aspects are deliberately lampshaded as being caused by the effect of the PowerPerversionPotential on the scientists.
* In Iain M.Banks ''Literature/TheCulture'' novels, Culture comprises a number of humanoid species who were genetically modified at the Culture's founding to be able to reproduce with each other. Humanoid species from outside the Culture who lack such modifications would not necessarily be able to do the same, sometimes finding that the Culture humans look [[a little unattractive. As masters of genetic tinkering and straight up body re-engineering, there's very little to stop the average Culture citizen from [[BoldlyComing seeking out exciting new alien races]] as the gender of their choice...
* Creator/IsaacAsimov's 'Tweenies' short stories features Martian-Human hybrids. Their most noticeable features are large white mohican crests and high intelligence. They are outcasts of both species. In the stories a sympathetic human ends up looking after several Tweenies, later becoming a small commune. Once older, they leave Earth to have adventures colonising Venus.
* Both protagonists of ''Literature/TheSagaOfTheNobleDead'' series are {{Half Human Hybrid}}s. [[ActionGirl Magiere]] is a dhampir whose birth was only possible because an EvilSorcerer intervened (and it took him years to get the spell right). [[TroubledButCute Leesil]] is a half-elf, born the usual way.
** Later you can also see a family of noblemen. Their ancestors have mated with the [[OurMermaidsAreDifferent merfolk]], so that almost everyone in their family is not a pure human being, but [[UnevenHybrid partly part of the merfolk]], even if they look almost completely human. But occasionally, one of them turns into a pure member of the merfolk, and flees into the sea.
* Creator/MichaelCrichton's ''Literature/{{Next}}'' has Dave, the son of a researcher who manipulated his DNA and a chimpanzee's donated cells. He displays both human and monkey aspects, especially in personality, where he ''flings poo.'' It's also implied, that, playing with the theme of genetic engineering gone insane and that people never expect problems with their newfangled tech, he's aging rapidly.
* Vestakia from Creator/MercedesLackey's ''Literature/TheObsidianTrilogy'' is, by definition, hellspawn. Around eighteen years before the start of the books, a powerful wildmage discovered she had been seduced and impregnated by a demon who styled himself a Prince of Shadow Mountain. Casting something halfway between a prayer and a spell, she was given a choice between making sure the child would be born looking normal and hoping a mortal upbringing would counter the [[AlwaysChaoticEvil evil in its soul]] or making sure the kid's soul was free of demonic taint while dealing with the outward effects of its parentage. She chose option B, confided in her sister, and (with said sister's help) ''[[BurnTheWitch ran]]''.
* ''Literature/TheHalfBloodChronicles'' by Creator/MercedesLackey and Creator/AndreNorton focus mainly on characters who are the results of elven lords impregnating their human slaves. The half-bloods/wizards are implied to be infertile, though it's never directly stated. The wizards find and save new half-bloods in order to perpetuate themselves as a society; they are never seen to have children of their own loins.
* The ''Bedlam's Bard'' series by Creator/MercedesLackey (and varying co-authors) has half-human, half-elven characters, but also states that the species are not cross-fertile unless deliberate actions are taken to make them so. One plotline in one of the books is Beth and Kory searching for a means to accomplish this without resorting to the means used by Perenor to father Ria (Which involved forcibly draining other humans of magic--with frequently lethal consequences).
* ''Literature/KingdomKeepers'' has fairlies, which are human and fairy offspring.
* Though hybrids have yet to appear prominently in Literature/{{Discworld}}, it's mentioned a couple of times that humans with dwarf or elf blood exist. Nanny Ogg is the most prominent human character with a trace of dwarf blood, which may explain her short stature and hard-headed ability to survive ballistic farmhouses (not to mention her son Jason's near-supernatural skill at metalwork). It's also mentioned that humans can interbreed with werewolves, with unpredictable results, and at least one major character is a demigod. There is also Susan, Death's granddaughter. While she is only related to Death by adoption, she nonetheless has some of his powers and traits (normal genetic rules apparently do not apply to AnthropomorphicPersonifications).
* In Kit Whitfield's ''In Great Waters'' all the royal houses of Europe (except Switzerland which is landlocked) have [[OurMermaidsAreDifferent Deepman]] blood. Any hybrid not of royal blood is termed a Bastard and summarily executed, usually by burning. All hybrids have small, needle-like teeth, black eyes with no white, clawed and webbed fingers and "legs" that are actually bifurcated tails which force them to use canes to walk. Because of inbreeding royals sometimes exibit other Deepman traits like bioluminescent blue skin (rare even among Deepmen) like Anne or tails that are whole down to the knees like Philip.
* In Creator/RobertEHoward's Literature/ConanTheBarbarian story "Shadows in the Moonlight" [[DreamingOfTimesGoneBy Olivia dreams]] of [[PhysicalGod a godlike being]] arriving to where a partly human, partly godlike being was [[ColdBloodedTorture tortured to death]], and turning [[TakenForGranite the torturers to stone]].
-->''"The youth they tortured was like the tall man who came?" he asked at last.\\
"As like as son to father," she answered, and hesitantly: "If the mind could conceive of the offspring of a union of divinity with humanity, it would picture that youth. The gods of old times mated sometimes with mortal women, our legends tell us."''
** In "The Scarlet Citadel," the alleged BackStory of Tsotha-lanti
* In L. Jagi Lamplighter's ''Literature/ProsperosDaughter'', Miranda learns that her mother was not who she thought she was, and therefore the demon that addressed a "nephilim" in her presence might have meant her.
* The Nephilim of ''Angelology'' who are descended from {{Fallen Angel}}s called Watchers. They look like tall, pale and beautiful humans, have lifespans measured in centuries and have wings like their fathers. They also have a warrior caste called Gibborim who are pure white with red eyes but red wings which they can use to [[PlayingWithFire create an incendiary wind]].
* In Creator/JasperFforde's ''[[Literature/ThursdayNext Something Rotten]]'', the Bradshaws explicitly avert this; they don't have any children because he's a man and she's a gorilla. For double irony -- they are fictional characters within the story.
* Meredith Gentry, in the [[Literature/MerryGentry series]] of the same name by Laurell K. Hamilton, is Unseelie Sidhe on her father's side and (I believe) human, brownie, and Seelie Sidhe on her mother's. In fact, about half the cast are hybrids, half-human or otherwise. This is to say nothing of her kids...
* The D'Artigo sisters of Yasmine Galenorn's Literature/TheOtherworldSeries have a human mother and a fae father. Additionally, Delilah was born with the powers of a werecat, and Menolly was turned into a vampire. Camille is a Moon Witch, but that's not exactly a species designation. Additionally, it would seem that interbreeding is reasonably common since "ordinary" humans are referred to as FBH's. (Full Blood Humans)
* Half-Elves form a whole race in Literature/ChroniclesOfTheEmergedWorld, while true elves aren't really present but said to be extinct. [[spoiler:Also the BigBad is part Half-Elf and part Human.]]

* In Creator/ArthurMachen's ''Literature/TheGreatGodPan'', the character Helen Vaughan embodies this trope as played for BodyHorror.
* Also present in Lynn Flewelling's Literature/{{Nightrunner}} and Tamir series, wherein the [[OurElvesAreDifferent Aurënfaie ]] and humans can interbreed, and such interbreeding is the reason some humans possess the ability to use magic. Such mixed-race individuals are known as Ya'shel (they would be half-elves in almost any other universe). This is all made even more interesting by the fact that the Aurënfaie are themselves [[spoiler:part-dragon]].
* ''Literature/{{Fablehaven}}'' has Kendra who is part human, part fairy. Curiously this was because fairies [[ItMakesSenseInContext kissed her]].
** Seth and the Sphinx are also like Kendra, [[DarkIsNotEvil although with traits on the other end of the spectrum]]
* In Aleksandr Zarevin's ''The Lonely Gods of the Universe'', many humans are descended from a mix of the original humans and HumanAliens from the planet Oll (who pretended to be Greco-Roman gods). Unlike their non-human ancestors, the hybrids are not immortal (the immortality is not due to genetics, though, but due to consuming an alien plant named Ambrosia that gained different properties on Earth). The only thing that appears to be the result of these inter-breedings is humans having different hair colors (apparently, original humans all had dark hair), thanks to the Ollans being redheads.
* In ''Literature/TheShadowhunterChronicles'':
** Warlocks are the progeny of couplings between humans and demons. They are themselves generally infertile, though Tessa Gray can have children, as her human parent was a Shadowhunter. This was very difficult to arrange, as the runes Shadowhunters bear will kill any warlock children the Shadowhunter might possibly have, but Axel Mortmain eventually arranged to obtain a Shadowhunter without runes.
** The shadowhunters or nephilims are also not pure humans, but hybrids of humans and angels. However, they are not born naturally, but by magic. However, their genes are dominant. If a nephilim has children with a human, they are also nephilims, even several generations later.
** Other than warlocks, the Downworlders are named as such because they have demonic blood in their veins. Vampires and werewolves are humans infected with demonic mutations, while faeries are said to be descendants of angels and demons who mated thousands of years ago.
*** Faeries, in turn, can sire children with humans, such as the elf-knight Meliorn. A special case is Mark and Helen Blackthorn, because their father was a shadowhunter and their mother was a faerie. Hybrids are born in a blank slate, with their upbringing deciding which world they belong. Meliorn was raised in Faerie and became immortal, while Mark and Helen were raised in the human world and became mortal.
*** In ''Literature/TheDarkArtifices'' it turns out that there are also common offspring of humans and werewolves. The "half-werewolves" cannot transform, but they are still significantly stronger, faster and more resistant than humans.
** Then there's Jonathan Morgenstern. He became a shadowhunter, who was also to a large extent a demon, through magical experiments. His son, Ash, is born to a faerie mother, meaning he is a shadowhunter-demon-faerie hybrid.
** Kit Herondale is a shadowhunter who has a faerie ancestor.
** James and Lucie Herondale, Tessa Gray's children with Will Herondale, are part-demonic shadowhunters, since their mother was fathered by a demon. Although neither are immortal, James inherits an ability to access his grandfather's realm, while Lucie can control ghosts, likely an exaggeration of the Herondales' natural ability to see ghosts that was boosted by her demonic blood. By extension, this means that their descendants, which include the modern-day Herondales (Stephen, Jace) and Blackthorns (Julian, Mark, Helen, etc.) are part-demon.
* Turns out James Stark in ''Literature/SandmanSlim'' is [[spoiler:[[{{Nephilim}} half angel]]]].
* Apparently, a human can produce viable offspring with anything in Jane Gaskell's Literature/{{Atlan}} series. The invader from the first novel, ''The Serpent'', is the product of a reptile mother and a human father, and later impregnates the heroine, Cija. In the fourth installment, ''The City'', a red ape breeds with Cija, [[spoiler:but her mother urges her to abort the resulting fetus]].
* In Jacqueline Carey's ''Literature/TheSundering'', Ushahin Dreamspinner (one of [[BigBad Satoris's]] three [[TheDragon lieutenants]] is half-human, half-Ellylon).
* In ''The Literature/GriffinsDaughter Trilogy'', half-human/half-elves--like the title character, Jelena--are known as ''hikui'' among the elves, and are treated as second-class citizens, at best. Which is still far better than half-elves are treated in the (human-ruled) Soldaran Empire, where the local religion says elves are demons looking to steal human souls and half-elves are creatures of evil.
* John's daughters in ''Literature/DirgeForPresterJohn'': Sefalet (half-blemmye) and Anglitora (half-crane). Anglitora is considered fairly lucky to be a human-looking woman with a crane's wing while Sefalet has no face, instead having eyes and mouths in her hands.
* In Vadim Panov's ''Literature/SecretCity'':
** Played straight with Chud', Lyud' and Tat' who can interbreed with humans. The descendants are capable of using the respective Sources of both parents. While Chud' and Lyud' often shun such children, Tat' actively works on both safeguarding their own bloodlines and on raising the number of human mages by deliberately introducing Chud' and Lyud' genes into the population.
** Averted with Moryanas. While a Moryana can bear children with a human, Chud' or Lyud' husband, she will only have daughters who will without exception be Moryanas.
* In V. Zykov's ''Way Home'' elves are cross-fertile with humans, and half-elves are somewhat bound to elven laws.
* Literature/PercyJacksonAndTheOlympians and its sequel series, Literature/TheHeroesOfOlympus, has nearly all the main characters being the children of humans and Olympian Gods.
* Played straight and averted in Katharine Kerr's Literature/{{Deverry}} series. Dwarves and elves are infertile with each other. However, ''both'' races are fertile with humans. And a half-dwarf is shown bearing twin daughters to a father of half-elven heritage.
** What ''really'' messes with your head is when said half-elf is turned into a dragon... and has a son with another dragon.
** Several aspects of the hybridization are played with. There are three half-elf/humans shown in the cast. One is a weak, unstable character and magic/dweomer user, one is a strong dweomer user, and the third is a powerful warrior (but he probably would have been such regardless of his heritage). It is hinted that the human mother of the strong dweomer user may have had some elf-blood in her makeup, as well.
* ''A Thousand Words for Stranger'', the first book (publishing-wise) in Julie E. Czerneda's ''Literature/TheClanChronicles'' series, mentions rather offhandedly that there are three known species with which humans can have offspring. In all cases, medical intervention is required and the child is infertile. It is implied but never confirmed that the {{Human Alien|s}} protagonist and her human love interest may also be inter-fertile.
* In Creator/KatherineKurtz's Literature/{{Deryni}} works, some characters have one Deryni and one ordinary human parent. The arcane abilities are a dominant trait, so having only one Deryni parent is enough to make an offspring Deryni, and the power isn't additive (in other words, having two Deryni parents doesn't make one more powerful). Sadly, this doesn't prevent HalfBreedDiscrimination.
* In the Literature/JWWellsAndCo series, Mr. Tanner, one of the partners, is half-goblin. (His shapeshifting goblin mother works as a receptionist for the firm.)
* In ''The Sky Village,'' Mei/Dragonfly and Rom/Breaker are ''tri-''human hybrids because they carry the "kaimira gene", which gives them beast (animal), human, and "mek" (robot) DNA.
* Averted in Robert J. Sawyers’s ''Calculating God'': Tom Jericho is showing ''Franchise/StarTrek'' to StarfishAliens:
-->'''Jericho:''' (Spock’s) mother was a human; his father was a Vulcan.\\
'''Hollus:''' That does not make sense biologically. It would seem more likely that you could crossbreed a strawberry and a human; at least they evolved on the same planet.
** [[spoiler:But then again, the book ends with the creation of a three-species human/alien/alien hybrid, created with divine technology.]]

* Paul Richard Corcoran in Creator/MikhailAkhmanov's ''[[Literature/ArrivalsFromTheDark Retaliation]]'' is the son of Lieutenant Abigail [=McNeil=], who was captured by the [[HumanAliens Faata]] in the first novel ''Invasion'' and impregnated with the genetic material of a high-caste Faata with PsychicPowers. To maintain secrecy, the child was officially recorded as the son of Abigail [=McNeil=] and her lover Lieutenant Richard Corcoran (who was killed aboard the alien ship). Paul grew up to hate his biological father and the entire Faata race. His latent PsychicPowers manifest themselves when he is 37, right when the humans are preparing a strike force to pay the Faata back for the millions of lives lost during the failed AlienInvasion. Strangely, the fleet higher-ups don't consider Paul to be a liability and give him command of a frigate sent with the strike force, figuring his abilities may allow him to infiltrate the enemy. The subsequent books feature Paul's descendants as protagonists, as his genes begin to spread through humanity, and some of them exhibit his PsychicPowers and the "[[WhoWantsToLiveForever Corcoran curse]]". One of the descendants, Sergey Valdez, even manages to telepathically sire a child with a Lo'ona Aeo female name Zantu. The resulting child is genetically Lo'ona Aeo, but exhibits some human personality traits, such as desire for adventure and an ability to handle being near aliens (Lo'ona Aeo are xenophobic pacifists).
** Akhmanov's ''Trevelyan's Mission'' series takes place in the same 'verse but about 500 years after the last ''Arrivals'' book. The main character Ivar Trevelyan eventually discovers that he himself is a distant (about 1000 years) descendant of Paul Richard Corcoran, around the time he begins to manifest PsychicPowers and even gains the ability to teleport from world to world.
** Averted with the other HumanAlien races. The Haptors aren't even sexually compatible with humans. Many other humanoid races ''are'' [[BoldlyComing sexually compatible]] but can't produce offspring together.
* Subverted (and deconstructed) by way of BodyHorror in Mickey Zucker Reichert and Jennifer Wingert's ''Spirit Fox.'' The heroine is a usually-human woman possessed by the spirit of a now-dead fox; she sometimes shapeshifts involuntarily into fox form. During one of these shapeshifted blackouts, she's impregnated by a male fox. She later suffers a miscarriage because her grotesquely malformed half-human, half-fox twin fetuses are not viable.
* Mostly averted in the ''[[Literature/TheRiftwarCycle Riftwar Cycle]]'': humans, elves, dwarves, goblins, [[VoluntaryShapeshifting dragons]], etc. are different species, generally from different worlds. They may be mechanically compatible, but they can't produce offspring. Calis, the offspring of the Queen of the Elves and a half-human, half-Valheru father, is the only exception, and the impossibility of his existence is [[LampshadeHanging mentioned from time to time]]. (His father is pure AWizardDidIt, no breeding involved.)
* The titular ''Literature/UkiahOregon'' was created by [[TheVirus the Ontongard]] as a human hybrid, so they could use his offspring as ideal hosts.
* Ia from ''Literature/TheirsNotToReasonWhy'' turns out to be this. Her father was a [[EnergyBeing Feyori]].

* All of the Chimera of ''Literature/TheReynardCycle'' are this to one degree or another, though their ability to breed with ''anything'' can lead to creatures who are only human in that their great great grandparent had a human head. To keep their kind from completely regressing into animals, many of them kidnap humans for use as [[RapeIsASpecialKindOfEvil unwilling lovers.]]
* Tessa Gray from ''Literature/TheInfernalDevices'', is a warlock. [[spoiler:Her father was a demon who fooled Tessa's mother into thinking he was human.]]
* There are human-titan and titan-human hybrids in the ''Literature/TitanEmpire'' series. They're produced as a side effect of life-extension treatments for humans, which make the species' DNA "compatible." (It's posited by one Terran scientist that the species must share a common ancestor.) As Titans are about 24 times taller than humans, it's best that the size of the offspring's basic size is the same as their mothers'.
* The Nephilim from ''Literature/PenrynAndTheEndOfDays'', are children of angels and humans.
* Myrren Kahliana from ''Literature/DarkHeart'' is the daughter of a human father and a [[HornyDevils succubus]] mother given to him by the priests of Vraxor as a reward for his military service.
* Subverted early on in the {{Franchise/Mistborn}} series. There are the nobility and the skaa. While it's fairly obvious to the reader early on that they're all human (or, more technically, [[spoiler:a variation of humans tweaked by the Lord Ruler to survive the increasingly CrapsackWorld]]) members of both the nobility and the skaa believe that there's an actual difference to varying degrees. The nobility are the ones that have Allomancy (read "magic") and are forbidden to interbreed with the skaa. But the sheer number of skaa with Allomantic powers (one of the jobs of the [[EliteMooks Steel Inquisitors]] is to root out skaa with Allomancy) shows this rule is largely ignored in reality although there are some references to nobles killing skaa after having sex with them to avoid "half breeds." It's later revealed that skaa and nobles ''started out'' as two different species and that the Lord Ruler put the laws in place to keep it that way, but that those laws have been broken so often over the last thousand years that the difference has become miniscule.
** Although we don't see half-breeds among the other sentient species (the kandra and koloss) it turns out that [[spoiler:they're both (mostly) human stock. The koloss are created directly from humans and the kandra are the descendants of humans warped by magic but breed true as non-sentient mistwraiths until given sentience.]]
* One of the protagonists of one of the first science-fiction novels, ''Auf zwei Planeten'' ("On Two Planets", 1897) by [[Creator/KurdLasswitz Kurd Laßwitz]], is Friedrich Ell, the son of a Martian explorer stranded on Earth (his spaceship crash-landed in Antarctica) and a German governess living with a family in Australia.
* ''Literature/RedMoonRisingMoore'': There are plenty of half-vamps and half-wulves, as well as hybrids of the two non-human species.
* The urban fantasy ''Literature/RedRoom'' series protagonists Derek and Penny Hawthorne are a subversion in that while their mother was a dragon, she was transformed into a human at the time and they are thus completely human. It still makes them subject to FantasticRacism, though.
* In ''Literature/{{Dragonvarld}}'', Vengeance is roughly human-shaped, but has scaled legs and clawed feet like a dragon, reflecting his father. It nearly gets him killed as a baby, since the midwife [[TorchesAndPitchforks raises an angry mob]].
* Efrel in the ''Literature/KaneSeries'' novel ''Darkness Weaves'' has it as her back story. Her mother was raped by [[EldritchAbomination ocean-dwelling demons]] Scylredi and lost her mind. As a result of her mixed blood, Efrel is very skilled at dark arts, not to mention very hard to kill.
* Merlin from ''[[Literature/{{TheChroniclesofAmber}} Amber]]'' would qualify, as his father Corwin is (mostly) human, while his mother Dara is a (mostly) shapeshifting demon.
* The main, eponymous character and narrator of ''{{Literature/Seraphina}}'' is half-human, half-dragon. Such union is possible, since dragons can take human form--but it is explicitly forbidden by her country's law, not to mention religion. Half-dragons from the book can vary in appearance, from almost-humans with some draconic elements (like a patch of scales somewhere on their bodies) to misshapen monstrosities. And they all share some supernatural powers.
* In Creator/JohnScalzi's ''Literature/TheAndroidsDream'', [[spoiler:an attractive pet shop owner turns out to be 18% ''sheep'' (specifically, of the Android's Dream variety). Despite this, she looks and acts completely human and doesn't even suspect that she's not 100% human. Her mother was a genetically-engineered HalfHumanHybrid to satisfy the kinds of zoophiliacs. Meanwhile, the followers of the Church of the Evolved Lamb (a self-admitted ScamReligion) see her as the culmination of their prophecies]].
* Trolls from ''Literature/MaledictionTrilogy'' can breed with humans and produce viable offspring. Mixed bloods usually inherit some magical power of their troll parent but it is greatly reduced. In the troll society, they are invariably slaves and their role depends on their level of magical power.
* Inverted in Creator/CliveBarker's "Skins of the Fathers", in which it's ''human males'' which are the product of hybridization. The Earth's original inhabitants were human women and the many-formed ''monsters'' which they took as lovers; the first male human children were the result of crossbreeding experiments GoneHorriblyWrong.
* Subverted in ''Literature/TheGolemAndTheJinni'': Jinn are [[ElementalEmbodiment spirits of fire]] and have water as a KryptoniteFactor, so when a woman becomes pregnant by a Jinni bound in human form, the hybrid is miscarried within weeks and leaves her quite ill.
* ''Literature/TheCrimsonShadow'': Siobhan, who's a half-elf child of an elven father and human mother.
* ''Literature/SebastianDarke'' is half-human (his father's side) and half-elf (his mother's side). As a result, he has PointedEars, causing most people to mistake him for an elf, and him having to awkwardly explain that he's only half-elf.
* ''{{Literature/Theriomorph Chronicles}}'': A Theriomorph is described as a human-animal hybrid that are engineered by Megiddo for minions via genetic engineering, cybernetics and other body modifications, enhancements and augmentations.
* ''Literature/TheWanderingInn'': Ceria, one of the side characters, is a half-elf.
* The German booklet series ''Maddrax'' has the mendrites, which are hybrids from humans and [[FishPeople hydrites]]. They have gray skin, similar to that of a dolphin, and pointed ears, sharp teeth, as well as claws and swimming-skins on the fingers and toes.
** In the beginning, there are only single mendrites, which are usually neither welcome either among hydrites or among humans [[HalfBreedDiscrimination because of their nature]]. But later there is a city where humans, hydrites and mendrites live together, and also have [[UnevenHybrid common offspring]].
* In ''Literature/TheSagaOfDarrenShan'' there are [[OurVampiresAreDifferent half-vampires and half-vampanezes]]. But because vampires and vampanezes are barren, they are not born like that. Humans are "sired" and made into half-vampires. After a while, mostly when they have proved themselves in the fight for society, they are made into pure vampires. If this does not happen, one day half-vampires also turn into pure vampires by themselves.
** Pure vampires are much more powerful than half-vampires, but half-vampires can also run during the day without [[DaywalkingVampire daylight doing anything to them]].
* ''Literature/MagnusChaseAndTheGodsOfAsgard'' has several characters that are the children of [[DivineParentage Nordic gods and ordinary humans]]. Half-gods appear to be born quite frequently.
** We also see a half-troll, but as it turns out later, he is only a camouflage for the god Odin. But that the camouflage has worked, implies that half-trolls really exists there.
* ''Literature/FeralTheStoryOfAHalfOrc'' has a half-Orc named Char as the main character, mostly to his [[FantasticRacism detriment considering how humans in his world feel about orcs.]] There is also a half-dwarf assassin, and research into 'hybrids' is apparently a thing.
* Arguably the basis for the {{Nephilim}} in ''Literature/HandOfMercy'' though interestingly the human-angel hybrids don't get any powers or advantages. Instead, they get horrific bone deformities, since the bones of angels are light as chalk in order to aid flight.
* In ''Literature/ManyWaters'' the Nephilim actually seem to be fallen angels themselves, unlike in the Bible, though Oholibamah is strongly implied to be one of their offspring.
* ''LightNovel/UnlimitedFafnir'': Dragons have the ability to transform Ds (human girls with supernatural powers) into more of their own kind, in order to reproduce with them. Despite both parents being physically dragons, the resulting offspring inherit some human traits. Kraken Zwei, the child of Kraken and Miyako, resembles a human girl except that her hair is a mass of mithril strands, the same metal that composes the Kraken's body.
* [[spoiler:Every single character]] in ''Literature/QuicksandHouse'' is this. Specifically, they're humans with some spliced-in genes from an alien race called Terramytes.
* ''Literature/VillainsByNecessity'': [[spoiler:Sam]] it turns out is half-elven.
* ''Literature/LandOfOz'': Princess Ozma is the daughter of King Pastoria and the fairy queen Lurline. Whether she was adopted by Pastoria or is his blood child is a matter of DependingOnTheWriter.
* {{Discussed|Trope}} in ''[[Literature/FortunesOfWar Dreadnought!]]'', when a native of Palkeo Est introduces herself to the lead character and jokes that her species is a lot like humans but can't successfully mate with them...and they've tried.
* The titular character of ''Olive Kennedy, Fairy World M.D.'' is half-elf on her father's side.
* ''Literature/SamBangsAndMoonshine'': Discussed. Sam is actually fully human but she lies about her (actually dead) mother being a mermaid.

* In ''Literature/LegendsOfTheRedSun'', the leader of the Screams gang was born from the union of a human male and a banshee (banshee is this world are a human-like race that has the psionic ability to sense imminent death and they wail as a reaction to this). As such he's referred to as a banHe and while he can detect imminent death like a real banshee, he ends up vomiting explosively instead of wailing. This later causes his death during the Okun invasion, so many people die that he exploded from vomiting so much.
* In ''Literature/TheFeyAndTheFallen'' books, Liam is the child of an Irish faerie called a Puca and a human woman. While there are other half-fey hybids running around, it's stated that most of them don't make it past childhood, either because they're killed [[BurnTheWitch by the Church]], or they go mad because of their dueling natures and wind up killing themselves.
* ''Literature/ProphecyApprovedCompanion'': Qube was "the only half elf with magical abilities in the village". And it's implied that the other half is human as otherwise it'd be worth mentioning.
* ''Literature/TheNeanderthalParallax'': One of the major subplots is Mary and Ponter's struggle to have a child together. [[spoiler:They eventually manage due to a [[DesignerBabies gene-rewriting device]], and have a daughter.]]
* ''Literature/TheWaterAndTheWild'': [[TheProtagonist Lottie Fiske]] haf a sprite mother, and a human father. She was sent to live with the Yateses while [[spoiler:her parents died from ThePlague in the fairy world]].
* ''Literature/InCryptid'':
** Elsie and Artie are [[LivingAphrodisiac lilu]], better known as succubi and incubi. Their motheir is a human, and their father Ted is an incubus. Thanks to DominantSpeciesGenes, so are they.
** Sam Taylor is the son of a fūri and a human woman. Likewise, he considers himself fully fūri (despite never meeting any others of his kind), and has all the abilities of one.
** [[spoiler:Frances Brown, great-grandmother of the main characters]] was the daughter of a human and a Kairos, a species whose [[PlanetOfHats hat]] was being UnluckilyLucky. She never knew this however, and it was only revealed decades after her death.
* ''Literature/ADealWithADemon:'' At the end of ''The Dragon's Bride'', Briar Rose and Sol's daughter is a half-human and half-dragon hybrid.