The name Doctor is a boy's name of English origin. Doctor and discussed in our forums with posts like "A Lot Can Happen In Sixty Years - Part 1".
From the experts:
Doctor is an honorific used as a name, somewhat like names such as Bishop, King, and Princess. Banned in New Zealand, Doctor can lead to the kind of confusion you may feel would be only positive for your child -- a bona fide Doctor before he even gets to kindergarten. At its zenith in 1884, Doctor was used for 12 boys, but last year it didn't even clear the five-baby minimum to make it onto the Social Security extended list.