Swampwalker, let me guess... with a name like that, you must be a wetlands/soil scientist (self-employed), making your living digging holes and tying little flags on trees. Did I guess right?!
As for mine, someone had already taken my name and given that I have a minimum of 8-10 different logins I use at work each day, I chose something completely different for Agon, a nickname given to me by a friend in high school. It is based on my first name Travis and the fact that he was an Elvis Costello fan.