What should I name my hamster?

Me and brother just got a hamster a few weeks ago.I named him Scrumpy. Then a couple of days ago we found out it has only 3 legs so my brother said his name is Mr.Waddles and I said ok. Then he said his name is Stubby cause where his 4th leg is missing its like a stub there. So what should we name him: Mr. Waddles, Stubby or Scrumpy?