History Main / UnrelatedInTheAdaptation

* ''Film/TheBlueLagoon1949'': In the [[Literature/TheBlueLagoon original novel]], the leads are KissingCousins, but due to UsefulNotes/TheHaysCode forbidding an incestuous relationship, the leads became unrelated.

* In ''Series/{{Inhumans}}'': In the comics, ComicBook/BlackBolt and ComicBook/{{Medusa|MarvelComics}} are KissingCousins, but in the TV show, Medusa's dialogue indicates that she and Black Bolt aren't related.

** Rey is not [[spoiler: the daughter of Han and Leia, which barring some even more surprising late revelations, presumably means she's not the granddaughter of Palpatine]].

* In the 1973 Russian version of ''Animation/TheNutcracker'', the heroine (who goes unnamed, since there's no dialogue) is a maidservant who works for the family that hosts the Christmas party. In [[Literature/TheNutcracker the original book]] and [[Theatre/TheNutcracker the ballet]], Marie (or [[AdaptationalNameChange Clara]]) is their daughter. This change frees her to leave permanently with the Nutcracker Prince and presumably live HappilyEverAfter with him, instead of finding herself back home in the AllJustADream or OrWasItADream ending of other versions.

* Subverted in ''Justice League United'', where the ComicBook/New52 incarnation of Adam Strange's wife Alanna initially appears to be a human woman with no relation to Sardath, but near the end of the series turns out to still be Sardath's daughter after all.

** In ''ComicBook/TheAvengers'' comics, ComicBook/{{Ultron}} was created by [[ComicBook/AntMan Henry Pym]] (who would later debut in the MCU with ''Film/AntMan'', released a few months after), and thinks of him (resentfully) as his father. In ''Film/AvengersAgeOfUltron'', this is instead his relationship with Tony Stark.

* In the original ''Literature/TheMoomins'' novels, Snufkin is Little My's half-brother. In the 1990's anime adaptation, their connection is never mentioned, and one scene has Little My ask Snufkin out on a date (to which [[AbhorrentAdmirer he reacts with horror]]).

* ''Anime/TenchiUniverse'': Implied with Ryoko and Washu. Whereas in the [[Anime/TenchiMuyo previous version,]] the former was said to be the latter's clone/creation (thus allowing her to technically be her parent), no such relationship is seen there, and if there is, Washu doesn't have the same connection or concern she did for her before.

* In ''Film/ClashOfTheTitans2010'', two rather [[SiblingSwitchSquick disturbing]] variants occur. For one, in this version, Perseus' mother, Danae, was a queen married to King Acrisius. In the actual myth, King Acrisius was her ''father.'' Furthermore, Perseus winds up with Io at the end of the film... a character who, in the story, would have been his ''great x 7-grandmother.'' Something this film shares with ''Film/ClashOfTheTitans1981'' is that in the actual myth, {{Medusa}} and Poseidon were {{Pegasus}}' parents, but here, Pegasus is a sacred animal of Zeus and has nothing to do with Medusa or Poseidon.

* ''ComicBook/BatmanBeyondRebirth'': One of the most notable discrepancies the comic has with the continuity of [[WesternAnimation/BatmanBeyond the original cartoon]] and [[ComicBook/BatmanBeyond previous comicd tie-ins]] is that the 20th issue has Melanie Walker state that Terry [=McGinnis=] isn't related to Bruce Wayne, disregarding the revelation in the ''[[WesternAnimation/JusticeLeague Justice League Unlimited]]'' episode "[[Recap/JusticeLeagueUnlimitedS2E13Epilogue Epilogue]]" that Terry and Matt were secretly Bruce's biological sons.

*** In the comics, Roy Stewart is [[Franchise/GreenLantern John Stewart]]'s grandfather. Here, Roy is [[CanonCharacterAllAlong John]] [[AdaptationNameChange Diggle]]'s stepfather.

** There's no evidence that [[Film/SpiderManHomecoming the Tinkerer]] and [[Film/BlackWidow2021 Rick Mason]] are related -- and even if they are, given the four-year age difference between Michael Chernus (Tinkerer) and O.T. Fagbenle (Rick), it's very unlikely they're father and son like in the comics.

* ''Manga/RecordOfRagnarok'': Alcides/Heracles is not Zeus' son, but was adopted by him after completing his Twelve Labors and ascending to godhood.

** Downplayed. Brindleface isn't Sandstorm's mother, but instead she is her aunt.

** Also done with the villains of ''Ninninger''. [[BigBad Gengetsu]] and [[TheDarkChick Ariake no Kata]] are husband and wife, [[TheDragon Kyuemon]] is Gengetsu's illegitimate son, while [[SixthRanger Mangetsu]] is the couple's biological son. None of their ''Ninja Steel'' counterparts, Galvanax, Badonna, Madame Odious and Brax, are related at all.

* ''Fanfic/FamilyGuyFanon'' makes it clear that Meg Griffin is not a blood Griffin and is an adopted child, with her real father is Stan Thompson. And the family hides this from her. This becomes important when in Season 21 she [[spoiler:finds out the truth accidentally and sets out to find her real father, which she does in "How I Met Your Real Father"]].

*** Jesse Quick is the daughter of WWII heroes Johnny Quick and Liberty Belle in the comics; in the show she's the daughter of CanonForeigner Harrison Wells.[[note]]Well, an AlternateUniverse Wells; the main-universe Wells died childless.[[/note]]

* ''WesternAnimation/TeenTitans2003'': In the original comics, Pantha is Wildebeest's adoptive mother. In the show, they are just good friends.

* The crew of ''WesternAnimation/SupermanTheAnimatedSeries'' wanted to use the original Kara Zor-El ComicBook/{{Supergirl}}, but DC's policy at the time following ''ComicBook/TheManOfSteel'' was that Superman was indeed the last survivor of Krypton. They compromised and made her Kara In-Ze[[note]]A MythologyGag, as that's her mother's surname in the comics[[/note]], a survivor of a nearby world that was wiped out by Krypton's destruction. The two decide to refer to each other as cousins, while in the comics they actually are.