Hm... well, not everyone has a name that feels familiar to me, but a lot of the names I have seen remind me of Fire Nation names? Things like Yosuke and Megumi and the like.

That, and the fact that apparently some of the other worlds have Zodiac animals assigned to their years as well... that's the sort of thing I wouldn't expect my world to have in common with others, but it's interesting that it does.