User blog comment:Spidey33/Marvel's first mutant/@comment-1943608-20100530161431

In real world historical terms Namor is the first mutant, albeit he wasn't identified as such until decades after his first appearance. In the Marvel Universe, he is predated by dozens of mutants, but Apocalypse isn't the eldest either. At more than 10,000 years old, Selene wipes the floor with 3,000 youngster Apocalypse.