Because I am an X-Men Evolution fanatic I go on these two websites; http://x-men.toonzone.net then go to profile or you can go to, http://evolution.eracerx.com and go to Bios. Hope this will help you!

Try wikipedia.

okay because i seriously have no life i will list them all here i'm sure you got your question answered but maybe someone else will need this information and i'm really bored right now so
x-men
1. scott summers - cyclops
2. jean grey- doesn't really have one logan calls her red and in the comic i think its pheonix or something
3. evan daniels-spyke
4. kitty pryde - shadowcat
5. kurt wagner - nightcrawler
6. rouge is rouge
7. ororo monroe- storm
8. hank mccoy- beast
9. logan- wolverine
10. professor charles xavier- professer x i guess not official codename
new mutants
1.ray crisp- berzerker
2 samuel guthrie-cannonball
3. robert "bobby drake"- iceman
4.julibation lee- julibee
5.Rahne sinclair- wolfsbane
6. amara aquilla- magma
7.tabitha smith- boom boom
8. Roberto de costa- sunspot
9. jamie mallox-multiple

brotherhood
1. Lance alvers- avalanche
2. Fred dukes- blob
3. todd tolansky-toad
4. pietro maximoff- quicksilver
5.raven darkholme-mystique
6. wanda maximoff-scarlet witch
so there it is the brotherhood and xmen :)