There are several shapeshifters in X-Men, but perhaps the best known is Mystique.
X-Men (2000)
X-men last stand
His name is Iceman.
Wolverine and the x-men
The X-Men live in Westchester,New York
Nightcrawler's true name in the X-Men comics is Kurt Wagner.
X-men Xavier Xander from 'Drawn Together'.
Her full name is Ororo Munroe
Professor X (Charles Xavier)
Her name is Storm
Mystique from X-men: her real name is Raven
Professor Charles Francais Xavier