Author
- Richard Nykke1
- Richard Robinson1
- Richard Rolle5
- Richard Treby1
- Richard Ward1
- Richard de Fournival1
- Richard de Geveldale1
- Richard de Saint-Laurent2
- Richard of Middleton2
- Richard of Saint Victor4
- Rifāʾī, Muḥammad ibn ʻAlwān1
- Riyazi2
- Ro. Ba1
- Robert Ashley1
- Robert Beale1
- Robert Cooke3
- Robert Fabyan1
- Robert Gazeley1
- Robert Grosseteste8
- Robert Holkot1