Namor the Sub-Mariner is a fictional character appearing in American comic books published by Marvel Comics. Debuting in early 1939, the character was created by writer-artist Bill Everett for comic book packager Funnies Inc. Initially created for the unreleased comic Motion Picture Funnies Weekly, the character first appeared publicly in Marvel Comics #1, October 1939, which was the first comic book from Timely Comics, the 1930’s–1940’s predecessor of Marvel Comics.

The mutant son of a human sea captain and a princess of the mythical undersea kingdom of Atlantis, Namor possesses the super-strength and aquatic abilities of the Homo Mermanus race, as well as the mutant ability of flight, along with other superhuman powers. Through the years, he has been portrayed as an antihero alternately from a good-natured but short-fused superhero or a hostile invader seeking vengeance for perceived wrongs that misguided surface-dwellers committed against his kingdom.