- Matthew Vincent Chicoine
- Maurice Baring
- Meaghen Hale
- Michael Coren
- Michael D. O'Brien
- Michael Thompson
- Mike Schramm
- Miles Smit
- Miriam Westen
- Moran Vitoria Wortman
- Msgr. Ronald A. Knox
- Nikola Vanderheyden
- Orestes Brownson
- Pater Ignotus
- Pater Peregrinus
- Patrick Doherty
- Patrick Owen Brown
- Patty Knap
- Paul Suski
- Paul-James Dwyer
- Paula Adamick
- Peter Bartholomew
- Peter Day-Milne
- Peter Hála
- Peter Maurin
