Thanks, lucidzfl.
You know, for a bunch who like to answer questions with "why don't you Google it," you're awfully quick to say "I don't know what that means."
Well, to expound a bit more.
I've played WOW, Camelot, City of Heroes, and a few other things.
I would say that a good half of the names of all the places in those video games are ripped straight from mythology. Your best bet if your'e curious about that is to look it up and see if its derived from a public domain term.
In the case of something OBVIOUSLY proprietary, say "Hyrule" from zelda, I would definitely steer clear.
My story is entitled "The Telamon." The telamon is a big nasty creature in a zone of Dark Age of Camelot. But I looked it up and it had history going back to ancient greece, so I'm pretty sure its safe.
I would definitely not let it hang you up on writing it though. If you should be so lucky as to finish your story, let alone submit it, it should be the onus of your agent/editor/publisher to look into any legal requirements.
You're the writer damnit. You're creative, not a law student!