Author
- Petrus Comestor1
- Pietro de' Crescenzi1
- Porphyry1
- Ptolemy1
- 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
- Seneca1
- Serapion the Younger1
- Sharif Radhi1
- Shem Tov ben Abraham ibn Gaon1
- Shlomo ben Aderet1
- Shāfiʻ ibn ʻaly1
- Simon de Lenis1
- Stephanus Hugoneti1