Wikipedia: The X-Men are a fictional team of superheroes appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist/co-writer Jack Kirby, the characters first appeared in The X-Men #1. They are among the most recognizable and successful intellectual properties of Marvel Comics, appearing in numerous books, television shows, films, and video games.
X-Men in other media
Doom Patrol , a similar team of super-powered misfits appearing in comics published by DC Comics.