Protestant Christianity: Biographies
- Paul Gerhardt
- Paul Johannes Tillich
- Paul Sabatier
- Peter Cartwright
- Peter Jasper Akinola
- Peter Waldo
- Philander Chase
- Philip Melanchthon
- Philip Schaff
- Philip William Otterbein
- Philipp Jakob Spener
- Phillips Brooks
- Pietro Martire Vermigli
- Reinhold Niebuhr
- Richard Allen
- Richard Baxter
- Richard Cameron
- Richard Hooker
- Richard Whately
- Robert Barclay