My first was blazer11. I got blazer from the nametags at the local laser tag, and I copied the number 11 off my friend. Probably used hundreds since then.
Gurtaton. It's some random meaningless name that I came up with when I was 11, because I was tired of having to pick a different username everytime I signed up on different places.
cooldude2934. I was one cool dude and I am not sure how I came up those numbers. I think I just thought it was catchy when you say it. Cool dude two nine three four