Author
- Raghib Isfahani1
- Raghudeva Nyāyālaṅkāra1
- Ralph of Longchamp1
- Ramon Llull1
- Ranieri Farnese1
- Ranulf Higden1
- Raphael Ben Zion1
- Raphael Levi Hannover1
- Raymond of Sabunde1
- Rayḥān Āghā ibn ʻAbd Allāh1
- Refael Mordekhai Malki1
- Refiʻı̂1
- Republic of Venice1
- Revanî1
- Richard Bolter1
- Richard Burdet1
- Richard II of England1
- Richard Nykke1
- Richard Ward1
- Robert Ashley1