He allegedly spawned unidentified offspring.
Cthulhu's name was invoked by Thoth-Amon along with Set's and Vrathuggulos's names, by Thulandra Thuu along with Vramma's, Almuric's and Yog-Sothoth's names, and by the men of sea when they called for their god Dagon. His name was one of many invoked by Dharmi Shan.
At an unknown point, the Old Ones, possibly including Cthulhu, were reborn in a different form, into one simple spiritual entity, the source of all persecution, toxic pride and true depravity: God when his name was invoked in hatred. They assumed various identities, including Ra, prayed by the Egyptians for him to keep the slaves in line and themselves wealthy. This tale was told in opposition to the Old Ones fleeing to an alternate dimension, although it is established many did left, under different circumstances.
Although, Cthulhu seemingly remained an individual entity, whose location was seemingly known at least by Wong.
Cthulhu seemingly became part of pop culture, his name was featured on posters such as "Cthulhu Lives!", and was used as a synonymous for eldritch demons and horrors, including Moridun, Gathonagog, and seemingly the Exo-Parasites, Shoggoths, and Viral Parallels.
- Cthulhu was created by H.P. Lovecraft in the short story "The Call of Cthulhu" (Weird Tales; February, 1928).
- First appearing in Marvel Premiere (1972-73), Sligguth, as the son of an Elder God worshiped by the people of the New England coastal town of Starkesboro, humans turned into Serpent-Men, is considered as inspired either by H.P. Lovecraft's Dagon, or Cthulhu, while the Serpent-Men represent the Deep Ones and Starkesboro in place of Innsmouth.
- Cthulhu's first reference was erroneously stated in the Demons' profiles of the Marvel Zombies: The Book of Angels, Demons & Various Monstrosities #1 and Official Handbook of the Marvel Universe A to Z #3 to occur in Savage Sword of Conan #52 (May, 1980). The earliest reference occurred in Savage Sword of Conan #41 (June, 1979).
- Cthulhu never actually appeared, apart from:
- It is hypothesized that both Cthulhu and R'lyeh appeared, unnamed (though the creature was stated to be an Old One), in Doctor Strange, Sorcerer Supreme #1 (November, 1988), though it remained unconfirmed.
- as illusions, one cast by Khonshu in Moon Knight #191 which Moon Knight saw, another time in two forms, unnamed in Moon Knight #199.
- A few characters were seemingly inspired by Cthulhu:
- Shuma-Gorath, named after Robert E. Howard's mention of the "Iron-Bound Books of Shuma-Gorath", is considered by some to be the Cthulhu of Marvel Comics.
- Yogthulu, appearing in "Doomsday" (Iron Man: Armored Adventures Season 2 20; June 13, 2012) was presumably named after Yog-Sothoth and Cthulhu.
- The Many-Angled One Kthl/Ktuhl, first mentioned in Thanos Imperative #1 (August, 2010) is seemingly a reference to Cthulhu, and might be Cthulhu himself or a counterpart to him.
- In Savage Sword of Conan #176, the chant "Ph'nglui mglw'nafh Ctulhu R'lyeh wgah-ngal fhtaga!" was uttered, which is a slight variation of Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn, which can be translated by "In his house at R'lyeh dead Cthulhu waits dreaming"), though the sentence hasn't been translated in-universe so far.
- In Symbiote Spider-Man: Alien Reality #1 (December, 2019), Spider-Man joked about Cthulhu being held in a coke bottle in the Sanctum Sanctorum, but interrupted Wong before he could correct and tell him Cthulhu's actual location.
- The Dweller-in-Darkness was formerly believed to be the spawn of Cthulhu, but was confirmed to be a "worthy scion of [...] Cthulhu, though no direct relation exists." (see the Dweller-in-Darkness' page for more information).
- The "children of Great Cthulhu" were mentioned in Conan the Barbarian #141 (December, 1982). It is unknown if the "children" mentioned exist or are a metaphorical relationship.
- The Cthulhu Mythos provide the names of at least some of Cthulhu's offspring, including Ghatanothoa, Ythogtha, Zoth-Ommog, Cthylla, T'ith, Leviathan, Nctosa and Nctolhu. Currently, only Leviathan (Tiamat) has appeared, as the primeval embodiment of the sea for the Annunaki (Mesopotamian gods), and not as the Cthulhu Mythos character,. though her descendants Ea and Dagon have been hypothesized to be Lovecraft's Dagon.
- Cthulhu's name was used as a synonymous for eldritch demons and horrors, the same way H.P. Lovecraft's last name is used as an adjective for eldritch entities (see the trivia section of H.P. Lovecraft's page).
- 3 minor appearance(s) of Cthulhu (Earth-616)
- 8 mention(s) of Cthulhu (Earth-616)
- 2 mention(s) in handbook(s) of Cthulhu (Earth-616)
- 4 invocation(s) of Cthulhu (Earth-616)
- 3 image(s) of Cthulhu (Earth-616)