He proved a theorem that LW-style rationalists are (rightly) fond of. That's not particularly the same as being a rationalist in any useful sense.

But if you are going to use him, note that "Reverend" is supposed to accompany a person's full name, not just their surname. You don't say "Reverend Bayes" or even "the Reverend Bayes"; you say "the Reverend Thomas Bayes" or "Reverend T Bayes". (I think "Reverend Thomas" is more acceptable than "Reverend Bayes".

Also, when you write "Reverend" seven times in one short paragraph, it starts to look really odd :-).