In most of the MMOs I've played you could only pick one name, so I usually used Tressym. A tressym is a winged cat from D&D Forgeotten Realms but I really just picked the name because it was unique. But when I started FFXIV I couldn't think of a good last name to go with it so I went with the name I used for my alts in those other games, Acesfool, which is a play on poker slang for a full house. And of course it was easy to split into a first and last name.