Sometimes it is best to just wait and see if they name themself, we have had a PITA, Big But-, Fat Boy (no explanation for those 3), Rain Man (He was just a little special), Billy Jack (early on it seemed like he knew Karate), Flash, took him about an hour to get any where, We have also had a Steve the Steer, plus Bill and Ted.
Friends of ours have had a Bucket Head, (he got a bucket stuck on his head)