Author
- Nicholas Trivet2
- Nicholas of Gorran2
- Nikolaus von Dinkelsbühl2
- Onasander2
- Peter Lombard2
- Petrus Aureolus2
- Petrus Comestor2
- Pietro Candido Decembrio2
- Pietro d'Abano2
- Pliny the Elder2
- Pseudo-Cicero2
- Pseudo-Phalaris2
- Pseudo-Seneca2
- Qarajah Aḥmad2
- Qutb al-Din Razi2
- Ramon Llull2
- Raymond of Penyafort2
- Richard of Saint Victor2
- Rodrigo Sánchez de Arévalo2
- Shams ad-Din al-Fanari2