Alias

X-Men
Nick Name
Children of the Atom
Founding Members

Angel II

Beast

Cyclops

Iceman

Marvel-Girl I

Professor X
Members

Angel II

Banshee

Beast

Bishop

Cable

Cannonball II

Chamber

Changeling

Colossus

Cypher

Cyclops

Dark Beast

Dazzler II

Forearm

Forge

Gambit

Havok

Husk

Iceman

Irina

Joseph

Jubilee

Juggernaut

Karma

Legion

Lifeguard

Lockheed

Longneck

Longshot

Maggott

Magik I

Magneto I

Magma

Marrow

Mimic

Mirage II

Nightcrawler

Northstar

Omerta

Phoenix II

Phoenix III / Marvel Girl III

Polaris

Professor X

Psylocke

Revanche

Rogue

Sabretooth

Sage

Shadowcat

Slipstream

Stacy X

Stepford Cuckoos

Storm

Sub-Mariner

Sunder

Sunfire I

Sunpyre

Sunspot

Thunderbird I

Thunderbird III

Warlock II

Warpath

White Queen II

Wolfsbane

Wolverine

Wraith

X-Man

Xorn I

Xorn II
Secret X-Men

Darwin

Petra

Professor X

Sway

Vulcan
Xavier's Security Enforcers

(X.S.E.)

Bishop

Cannonball II

Marvel Girl III

Nightcrawler

Sage

Shard

Storm

Wolverine
Occupation
Affiliation of super-powered mutants.
Legal Status
Not sanctioned by the United States government.

Some members have a criminal record in the United States and abroad.
Nation or Planet of Origin
Earth
Group Alliances

Alpha Flight

Avengers

Cadre K

Excalibur

Generation X

Morlocks

New Mutants

Starjammers

X-Factor

X-Force
Base of Operations
Xavier Institute, Salem Center, Westchester County, New York
Accessories
Cerebra: Global mutant detection system.

Cerebro: Long-range mutant detection system.

Danger Room: Holographic training and tactical scenario simulator.

SR-72 Blackbird:  Supersonic long-range aircraft.

X-Wing Aircraft: Custom supersonic long-range aircraft.
Common Enemies

Acolytes

Apocalypse

Arcade

Black Tom

Blob

(The) Brood

Brotherhood of Mutants

Cassandra Nova

Danger

Dark Beast

Dark Phoenix

Gene Nation

Goblyn Queen I

Hellfire Club

Holocaust

Juggernaut

Legion

Living Pharaoh

Magneto I

Marauders

Master Mold

Mesmero

Mojo I

Mr. Sinister

Mystique

Nimrod

 Omega Red

Onslaught

Proteus

Pyre

Sabretooth

Sauron

Sentinels

Shadow King

Silver Samurai

Stryfe

Toad

Upstarts

X-Cutioner
Regularly Appearing

Amazing X-Men

Astonishing X-Men Vol. 1 & 2

Professor Xavier and the X-Men

Uncanny X-Men

X-Men Vol. 2

X-Men: Children of the Atom

X-Men Unlimited Vol. 1 & 2

 X-Treme X-Men
First Appearance
X-Men Vol. 1 #1 (Sept. 1963)
Creator
Stan Lee & Jack Kirby
Origin
A group of mutants banded together and trained by Professor Charles Xavier to use their incredible powers for the betterment of mankind.  Their never-ending quest to bridge the growing gap between humanity and mutant kind while protecting a world that fears and hates them as the Uncanny X-Men.