Ding!
Although it was never mentioned out loud in the shows, it was visible on his ID.
A clue for the bonus is that there is some similarity with the inventor of the brassiere.
OK I am going to give the answer to the bonus question because I don't want to hold up the quiz and DrDick&Vick did answer the main question.
The shorter version is that this question appeared in Trivial Pursuit, but the given answer was "Philip". The reason they got it wrong was that they copied many questions from a book called “The Trivia Encyclopedia”. The author had deliberately included one question with a made-up answer (copying an old map-maker's trick) so that if anyone copied his work, he had proof and could sue for copyright infringement. That question was Columbo's first name and the fact that they had the same answer was given as evidence of copying.
Unfortunately for him, it did not prove that any other questions had been copied and so he lost the lawsuit.
(I mentioned the inventor of the brassiere as that is another question which Trivial Pursuit has the wrong answer for).