I guess it comes from peoples' general attraction to things that are new and individualism. Having a name different to everyone else makes you more recognisable and you. I can't be sure but the odds are that there is no one else in the world with my name, nor has there been, because both my surname and first name are rare and come from two different cultures. But I still rather have a Slavic name than a completely individual name.

Yes, a lot of people here want to give their kids "unique" names. Wtf, if you can't even baptise the kid the proper way?! ;D