SELENE - Born 17 thousand years ago. Undeniably the Oldest Mutant revealed and confirmed thus far. Has always generally been regarded as the oldest by many, after her age was hinted at, by her being active in the Hyberian area, but recently in NECROSHA, this date was given a more specific reference.
APOCALYPSE - I forget the details and references, I think like between 5000 to 3000 years ago he was born and went active? In any case he isn't older than Selene, but he is arrogant and probably thinks himself as the first. It is his name after all.
But im sleep
