One would think that amongst evolved humans in the enlightened, egalitarian future, it would be considered just as valid of an option, and not merely the butt of a joke.Also, apparently William Riker became William Troi in the first act of ST:Nemesis. Or at least that's how Picard subsequently addresses him, and even if it elicits a response supposed to be humorous, this doesn't mean the name change wouldn't be for real.
Timo Saloniemi
Kor