Charles Xavier

Many versions of the famous superhero Professor X have appeared in other media outside of his initial appearance in X-Men comics published by Marvel. 
*Charles Xavier (Marvel) - His original comic book character.
*Charles Xavier (Wolverine and the X-Men) - Charles Xavier from the 2009 cartoon series.
*Charles Xavier (X-Men Movies) - His appearance in the film series acquired by 20th Century Fox, a story that has no connection to the MCU.
*Charles Xavier (Earth-838) - The MCU appearance of Professor Xavier is from an alternate universe that appears in Doctor Strange in the Multiverse of Madness.