As of right now you can now give your character a last name if they are at least level 20. Click your hp bar to open a window to enter your last name, click OK, and you're done! Your last name will also show on leaderboards along with your title. Rad!

I don't know why, but for some reason I can't use the D key in the surname window. :p

lol forgot a few keys I think. let me fix