Mr Bob.s Real name

Someone wants to know what Mr Bob's real name is. This came about after he told me he had changed his name to Thatcher but he hadn't. His name is Robert Snortroll. I don't know why we call him Mr Bob. I think that's how it's spelt. I've never heard of it before. I think it might be Swedish, but I'm not sure. I tried looking it up but it translated to something rather unpleasant.