Author
- Nicholas Trivet1
- Nicholas of Salerno1
- Oglerio di Lucedio1
- Origen1
- Peter of Limoges1
- Petrus Riga1
- Pietro de' Crescenzi1
- Pius V1
- Pseudo-Seneca1
- Publilius Syrus1
- Ranulf Higden1
- Raymond of Penyafort1
- Richard Burdet1
- Richard II of England1
- Richard Nykke1
- Richard Treby1
- Richard Ward1
- Richard de Geveldale1
- Robert Gazeley1
- Robert Grosseteste1