What is a man of letters?

Answer 1

It is an educated person. Someone who has been to college and graduated has the right to put the letters of their degree after their name in correspondence, though most people don't do this any more. You've most likely seen this with doctors, who write either M.D. or Ph.D. after their names.

Answer 2

A man of letters is someone who is well-educated and accomplished in literature and the arts. They are knowledgeable in various fields of study, particularly in the humanities, and often engage in writing, scholarship, and intellectual pursuits.

Answer 3

The expression is "a man of letters." it means a writer. The usage "a man of many letters" could only exist as a clumsy way of saying a varsity player in many sports.