Possibly every X-Man or X-Woman
Here is the list of all the mutants/aliens/whatever who have had the honor or still do of calling themselves an "X-Man" or "X-Woman":
Here is the list of all the mutants/aliens/whatever who have had the honor or still do of calling themselves an "X-Man" or "X-Woman":
David Haller
Heather Cameron
Alani Ryan
Illyana Rasputina
Max Eisenhardt
Amara Aquilla
Calvin Rankin
Danielle "Dani" Moonstar
Raven Darkholme
Paul Provenzano
Sidney Green
Lorna Dane
David Alleyne
Charles Xavier
Victor Creed
Shadowcat
Davis Cameron
Squidface
Miranda Leevald
Shiro Yoshida
Leyu Yoshida
Eva Bell
John Proudstar
Neal Shaara
Christopher Muse
Tri-Joey
Gabriel Summers
James Proudstar
Rahne Sinclair
James "Logan" Howlett
Hector Rendoza
Laura Kinney
Nathaniel "Nate Grey"
Kuan-Yin Xorn
Kenji Uedo