As a kid my old man called me Knäcke Makaron which roughly translates hardbread macaroni. Neither him nor I have any idea why, I weren't particularly fond of either. Later on I used Knecke for web communities and games. A lot of my friends call me that, to the quite ridiculous extent that some people I've known for years didn't know my actual name for a long time.
Knecke was already taken at some places so I used knexzor where neccesary. It's pretty lame, but I sort of like Knex.
As for modeling my character, I look way too good to be accurately portrayed in a game. Besides, I'd look like every other fakeskater. Hence the hat and moustache.