So, i've been trying to make a chronological list of Marvel's mutants since that seems to be something the internet is lacking.
Here's my first draft. Anyone have anything to add or discuss?

Selene (over 10.000 years old)
Forever Man (?)
Saul (Known to be older than Apocalypse)
Apocalypse (Born 3000 BC.)
Azazel (several thousands years old)
Crule (Over 1000 years old)    
Exodus (Born in the 12'th century)
Damian Tryp (Over 700 years old, might not be a mutant)
Gideon (several hundred years old)
Candra (several hundred years old) 
William Burke
Nicodemus  
Elias Bogan (over 250 years old)
Cyber (born in ~1800)
Graymalkin (Born in ~1800)
Absalom  (over 150 years old)   
Margaret Slade (Born in the 1850's)
Black Womb (Born in the 1870's)
Hamilton Slade (Born in the 1870-1880's)
Frederick Slade (Born in the 1870-1880's)
Jack Starsmore (Born in the 1870-1880's)
Kabar Brashir (Born in the 1870-1880's)
Sabretooth (Over 130 years old)
Destiny (over 130 years old)
Mystique (Over 130 years old)
Gateway
Klara Prast (Born in 1895) (?)
Centennial (Born in ~1900)
Wolverine (Born in the 1900's)
Dr. Nemesis (Born in the 1900's)
Magneto (Born in the 1920's)
Namor (Born in the 1920's)
Toro
Scalphunter 
Gaia
Stonewall

Nice list. I have never heard of Forever Man before and I didn't know that Klara Prast was a mutant.

nothing to add other than i'm happy that your making this.
thank you.

" Nice list. I have never heard of Forever Man before and I didn't know that Klara Prast was a mutant. "

" @ComicMan24 said:

" Nice list. I have never heard of Forever Man before and I didn't know that Klara Prast was a mutant. "

I put a question mark on  Forever Man since i'm not sure. Some sites lists him as a mutant, supposedly he has a profile in the Avengers Assemble Handbook, but i haven't checked it out it yet. I've not been able to confirm whether Klara Prast is a mutant either, but all sites lists her as one. "

Nice work.

Most of the links are 404s but otherwise a nice list. Not sure if Azazel is not older than Apocalypse. Not doubting it, just not sure.

Yeah, the link thingy seems to be broke, or maybe it's my firefox.
Azazel might be older than Apocalypse, but it's hard to find evidence of it. 
It's also possible some of the other Neyaphim are quite old, but i've found nothing on them. Likewise for the Neo.