Author
- Reginold of Eichstätt1
- Regiomontanus2
- Remigio dei Girolami1
- Remigius of Auxerre2
- Renchius, Henricus1
- René of Anjou1
- Republic of Venice4
- Resmî Ali Baba4
- Ressani family2
- Revanî1
- Reynoldus Romanus1
- Reza-Qoli Khan Hedayat1
- Richard Bolter1
- Richard Brooke1
- Richard Burdet1
- Richard Carmarden1
- Richard Fishacre1
- Richard II of England1
- Richard Maidstone1
- Richard Nykke1