[Atraikius]

Mine came from a drunken mis-pronounciation durring a D&D game I was DMing my junior year. One of the players meant to say atrocious (as in 'what an atrocious character') when refering to the main villian, but it came out atraikius (ah-TRAY-ki-us). After that, I used that villian as the perpetual opponent whenever I DMed; eventually using him as the main character for all of the games I played, and as a handle on the net.