This isn't really a race change suggestion, it's a suggestion for a new feature entirely, so not sure why it was framed this way.

Anyway, I have very mixed feelings about the whole surname thing, even in FFXIV. On the surface it's cool, it allows NPCs to address the player in different ways, it opens up more ways to get the name you want, etc. But my direct observation in FFXIV is that rather than make "real(ish)" given name / surname combos, people mostly end up making lots of cliche two word phrases (a few I know personally- Diet Coke, Playstation Portable, Bicycle Salesman, Mash Buttons, and Catgirl Sniffer. I kinda don't really want to see this take root in XI if I'm being honest.

HOWEVER We really do need a name change feature. Frankly I think it should be included with the race change since it's more limited than it is in XIV yet costs more.