We have Rubens after the ex Ferrari - now Honda F1 driver Rubens Barrichello, i thought about Michael (after Michael Schumacher) but i thought my bun deserved a funky name and Schumacher was too long. He completely looks like a Rubens now and i couldn't see him being named anything else!
Probably worth pointing out that Rubens is a girlie but when we bought her we were told she was a boy, it was only when we took him to be deplummed we found out she was a girl hence the boys name.
And Dilbert was named after the cartoon character for no other reason other than i thought it was a funky name for a rabbit! We also went through Fernando, Valentino, Rick, Francis, Rossi to name but a few!