Author
- Peter Olivi1
- Peter Pascual1
- Peter of Poitiers1
- Petrus Comestor1
- Pierre de Maucreux1
- Pietro de' Crescenzi1
- Porphyry1
- Ptolemy1
- Qadi Ayyad1
- Qutb al-Din al-Shirazi1
- Ralph of Longchamp1
- Rashi1
- Richard Rolle1
- Robert Grosseteste1
- Sadr al-Shari'a al-Asghar1
- Salomon ibn Parhon1
- Saʻīd Najm al-Dīn ʻAjamī1
- Serapion the Younger1
- Shams al-Dīn al-Samarqandī1
- Sharif Radhi1