That's cool - your name is way more meaningful than mine.
It was a long time ago and I'm not 100% sure but I think it was sort of that I thought it was funny putting super on the front of an ordinary name - like "Superdave Osborn", and there's a band that sort of sounds like superchuck that was kind of funny, and the 500 is probably subconsciously related to auto racing. I don't think anyone has ever asked. Ha