What name does she go by now? Reagan or Valentine?
I know this has already been answered but I'll add my theory to a possible reason for the name change - and this will make me sound like a nerd but I don't care. On the Japanese Animated show "Cowboy Bebop", there was a female character named Faye Valentine. I don't know whether or not
our Faye was aware of that when deciding on that name or if it was purely coincidence, but it could've had an impact on changing it later on from Valentine to Reagan. Maybe someone else can verify it.