Should the 5th gen girl be named Buffy

Yes, totally. :D That would been cool, since we already have a Dawn it'd be a Buffy: The Vamire Slayer origin. We already have names based on the oulaws Jesse James and Butch Cassidy, so why not. ^^

Well, of all ideas fans have come up with, Buffy would certainly be the best. I wish she'll be called Buffy in English and Yobotome (means 'conficent girl' in Japanese), would totally fit her.