Author
- Peter Paludanus1
- Peter of Poitiers1
- Petrus Bonus1
- Petrus Comestor1
- Petrus Riga1
- Pseudo Bernard of Clairvaux1
- Ranulf Higden1
- Rashid-al-Din Hamadani1
- Raymond of Penyafort1
- Richard Maidstone1
- Robert de Sorbon1
- Robert of Gloucester1
- Saadia Gaon1
- Sadr al-Shari'a al-Asghar1
- Salomon ibn Parhon1
- Saʻīd Najm al-Dīn ʻAjamī1
- Sharif Radhi1
- Shem Tov ben Abraham ibn Gaon1
- Shāfiʻ ibn ʻaly1
- Taftazani1