I think Bob is a much better character name than Martin, unless Martin is from Mars. Its shorter, a palindrome, and I know a guy named Bob.
Knowing a man called Bob doesn't work for anyone else. A palindrome - so you are clever but what does it gain the story? Bob, over here, is a bloke (not a man) who gets 's hands durty, a builder loike, probably down the pub every night. It's chiasmus but where is the profit? Now Martin is a distinguished gentleman with all the panache of Mr Bond, James Bond if you don't mind. That diacope beats yourpalindrome (common kids stuff and your chiasmus (not much better).
More seriously it is the intention behind the name; Ian Fleming stated that "the name was designed to be the simplest, plainest, dullest-sounding name (he)) could find". He wanted a boring, dull government blunt do-it-man. You won't saddle a gregarious multi millionnaire playboy with something which sounds like a bottle washer in a brothel unless there is a kink in the story. OTOH you don't want Marmaduke Misanthrope unless .....