Holocaust (comics)
Holocaust is a fictional character that appears in comic books published by Marvel Comics. The character first appeared in X-Men Alpha (February 1995), and was created by Scott Lobdell and Roger Cruz. However, a character with the same name and similar appearance (without armor) was featured in "Stryfe's Strike Files" (January 1993), two years before X-Men Alpha was released. The info on Holocaust in "Stryfe's Strike Files" would seem to support that both versions of the character are one and the same.
Read more about Holocaust (comics): Fictional Character Biography, Powers and Abilities