Author
- Platonic Academy1
- Podius, Milanutius1
- Pomponius Mela1
- Porcellio1
- Porphyry1
- Priori (Florence)1
- Priscian1
- Pseudo-Phalaris1
- Ptolemaeus Tancredius1
- Ptolemy1
- Qadi Ayyad1
- Qasem-e Anvar1
- Qutb al-Din al-Shirazi1
- Raghudeva Nyāyālaṅkāra1
- Ramon Llull1
- Raymond of Penyafort1
- Raymond of Sabunde1
- Renchius, Henricus1
- Richard Burdet1
- Richard II of England1