History Main / CrossoverRelatives

** Fiona's father is revealed to be [[spoiler: The Frog Prince]] at the end of ''WesternAnimation/Shrek2'', while Prince Charming is the son of the Fairy Godmother.

** In the spin off 'Nemo: Heart of Ice'', Comicbook/HugoHercules mentions fathering a child in a town called Cactusville, and is later seen eating a pie made from an entire cow, with horns and tail sticking out. All of which implies he's the father of ''Comicbook/TheDandy'''s Desperate Dan.

* ''Franchise/MarvelCinematicUniverse'': In ''Film/CaptainAmericaTheFirstAvenger'', we are introduced to Private Jim Morita, a member of Cap's special unit in WWII, the Howling Commandoes. Years later, in ''Film/SpidermanHomecoming'', we meet Peter Parker's high school principal, also named Morita. Both are played by Kenneth Choi. The two Moritas are grandfather and grandson, confirmed by the presence of a framed photo of the older Morita in the older one's office.

* ''ComicBook/{{Daken}}: ComicBook/DarkWolverine'': Daken's evil ex-boyfriend turns out to have been an HonoraryUncle of Chase Stein of the ComicBook/{{Runaways}}, giving Daken an excuse to recruit the Runaways in order to help take him down.

** Both being spies, Tara King from ''Series/TheAvengers'' is now the sister of ''Series/JasonKing''.

* ''ComicBook/{{Daken}}: Dark Wolverine'': Daken's evil ex-boyfriend turns out to have been an HonoraryUncle of Chase Stein of the ComicBook/{{Runaways}}, giving Daken an excuse to recruit the Runaways in order to help take him down.

** Fiona's cousin is [[Myth/ArthurianLegend Arthur Pendragon]], and next in line for the throne of Far Far Away after Fiona and Shrek.

* ''Literature/WoldNewtonFamily'' (and its [[http://www.pjfarmer.com/woldnewton/WNUsitemap.htm online continuation by other hands]]): Most of the major Victorian and pulp heroes are descended from a small group of people, who were [[MagicMeteor affected by a meteor]] in the 18th century. The central relationship is that Literature/{{Tarzan}} and Literature/DocSavage are cousins, grandsons of the Duke of Holdernesse from the ''Literature/SherlockHolmes'' story "The Adventure of the Priory School". (Holdernesse is said to be Watson's name for the title Creator/EdgarRiceBurroughs called Greystoke, while Doc's father Clark Savage Sr is the illegitimate son that Watson called James Wilder; Farmer calls him James Clarke Wildman.)

* ''Literature/MagnusChaseAndTheGodsOfAsgard'': Magnus Chase is first cousin to Annabeth Chase from the ''Literature/CampHalfBloodSeries'' on their mortal parents' side, both of which are works of Creator/RickRiordan. The two interact a number of times across their respective series.

* On the spinoff ''OnceUponATimeInWonderland'', the Red Queen (who for once is ''not'' composited with the Queen of Hearts by an adaptation) is indicated to be a stepsister of some version of Cinderella. And Alice is married to a version of the Genie from ''Aladdin''.

* ''Series/OnceUponATime'' brings together multiple characters from classic Western fairytales and Disney animated films [[note]]The show was originated on the ABC network, owned by Walt Disney Company[[/note]], with an infamously twisted family tree of relationships:
** With the Season 2 reveal that Rumplestiltskin's son is Henry's father, Rumplestiltskin is "in-laws" [[note]] Henry's parents never married, so the exact relationship is a gray area[[/note]] with Snow White and Prince Charming, Henry's biological grandparents, and the Evil Queen, Snow White's stepmother ''and'' Henry's adoptive mother. Once Belle from ''Beauty and the Beast'' marries Rumple and [[spoiler: Snow White's daughter marries Captain Hook]], the web of in-laws gets... extensive.

** The Snow Queen from the original Hans Christian Anderson fairytale is not only [[WesternAnimation/Frozen2013 Elsa and Anna's]] aunt, but [[spoiler: was once Emma's foster mother. Particularly amusing since Emma's birth mother is [[Literature/SnowWhite also called Snow]]]].

** Also in Season 7, [[spoiler: an alternate version of Rapunzel]] is revealed to be the Evil Stepmother to Henry's wife Cinderella, and an alternate [[Literature/AliceInWonderland Alice]] is revealed to be the daughter of [[spoiler: the alternate Captain Hook]].

* ''Website/SCPFoundation'': In [[https://scp-wiki.wikidot.com/scp-4566 SCP-4566]], Literature/JohnCarter and [[Franchise/CthulhuMythos Randolph Carter]] were part of the Marshall, Carter and Dark FamilyBusiness before SCP-4566 [[TrappedInTVLand sucked them into their respective books]]. Their uncle Rupert bought the rights to both series shortly after.

--->[[CatchPhrase "Ain't I a stinker?"]]

[[folder:Newspaper Comics]]
* ''ComicStrip/HiAndLois'': One strip makes reference to "Uncle Beetle" in the Army. ''ComicStrip/BeetleBailey'' and ''Hi and Lois'' were both created by Mort Walker. Beetle is Lois' younger brother.
[[/folder]]

* In Creator/NPCarlsson's WebAnimation/{{YouTube Poop}}s, [[VideoGame/CrashBandicoot Dr. Neo Cortex]] and [[WesternAnimation/AdventuresOfSonicTheHedgehog Dr. Ivo Robotnik]] are twin brothers.

* ''Website/SCPFoundation'': According to [[https://scp-wiki.wikidot.com/scp-4566 SCP-4566]], Literature/JohnCarter and [[Franchise/CthulhuMythos Randolph Carter]] were part of the Marshall, Carter and Dark FamilyBusiness before SCP-4566 [[TrappedInTVLand sucked them into their respective books]]. Their uncle Rupert bought the rights to both series shortly after.

The trope isn't necessarily about individuals and can be applied to larger groups, up to and including entire species. For instance, a way to explain the presence humans in some distant system or galaxy is to have them as a LostColony of Earth -- which can be a lot more plausible than two identical species arising by pure chance. This also serves as a way of more closely integrating two or more settings into each other.

* ''Series/SesameStreet'': A 1991 five-part crossover special with the Israeli version of Sesame Street reveals that Oscar the Grouch and his Israeli counterpart are cousins.