Author
- Paschasius Radbertus2
- Paul of Pergula2
- Petrus Aureolus2
- Philip III of Spain2
- Piccolomini2
- Pierre Bersuire2
- Pierre Danes2
- Pietro d'Abano2
- Pinḥas ben Isaac2
- Pliny the Younger2
- Porphyry2
- Prosper of Aquitaine2
- Pseudo-Bonaventure2
- Pseudo-Jerome2
- Pseudo-Joachim of Fiore2
- Qara Emre2
- Qutb al-Din al-Safawi2
- Qāsim ibn al-Faḍl2
- Rafīʻā, Muḥammad ibn Ḥaydar, 1588 or 1589-1670?2
- Raghib Isfahani2