Anyone familiar with Monty Python's Life of Brian?

[Lydia Leftcoast]

21. All except Terry Gilliam graduated from either Oxford or Cambridge

and although I don't know about their education before the university level, I wouldn't be surprised if one or more of them attended a boarding school, in which case, Latin and Greek would have been core subjects in their era (the 1950s).

Terry Jones, in particular, was trained in history, and his post-Python life has included some very interesting documentaries about the ancient world (available on Netflix), so he's the most likely contributor of the Latin material. But in that era, anybody who was university bound would have studied Latin.