lol invertin isn't even a name, it's a word, of course it's going to be used be someone else, it's in the dictionary!
My name is sometimes taken too, but Zantalos is also Zantalo and Xantalo(s). So I just use any of the 3 other names if one's taken.
This one time, when I was looking for Usagi a long time ago when he wasn't back yet, there was this other account on Gamespot that was called Usagi. I was all excited and pm'd him if he was him and he was like, "no, I'm not."
Ok, nevermind that, you should make up a name that is either ok to have numbers or 's's or whatever add on behind it, are just make it so original that it's actually yours. Yeah, you'll have to start your reputation over I guess but... seriously, that's not that bad.