As others have said I'm a fan of using a thesaurus and Wikipedia to come up with ideas. But I'm also a fan of using real names. They may not be "real" names that you see in the real world, but they're the character's real names.
Examples include my Defender named "Stevie Daniel" and a Tanker named "John Wright" (both of those are actually pretty normal and John Wright is someone I actually know and just liked the name). Another Tanker simply named "Solomon" which I was really surprised wasn't already taken.
I have a Controller named "Poncho Cognito." Awesome name, IMO.
And I have two brothers. An elec/elec Tanker named "Cadillac Johnson" and his brother, an elec/elec Dominator named "Pontiac Johnson."
And there's lots of comic book characters that usually go by their real names. Jean Grey, Emma Frost, Lex Luthor, Dr. Doom (title + name), etc.
