I have 4
Renegade Doggie : I had a friend named Paragon Kitty, and I wanted a name that matched. Renegade Doggie is the opposite of Paragon Kitty, so I went with that for a really long time, and still use it alot today.
Sir Royal : Kind of came up with this one on the spot, no history there.
CrazedGunman502 : I was interested with Team Fortress 2 at the time, and when I saw the Meet The Sniper trailer and heard him mention "Crazed Gunman" I decidedly made it my IGN.
SnOoZiEsPuR : I liked to sleep alot, so that's the Snoozie part of my name, and I was a big fan of Burnout Paradise, and my favorite car was the Spur, so that's the other half of my name.
I love how my names have a history to them <3