1. true, it means whirlpool or eddy, but almost everyone in the manga/anime have a name with a meaning. take a look at ino, shikamaru or chouji... or how about the older jounins?

2. its impossible for him to be a child form the hidden village of mist... mainly because he was born in Konoha just before the Kyuubi moved in and attempted village-wide destruction...