Author
- Raimondo Marliani1
- Ranulf Higden1
- Rapolano Terme1
- Rashid-al-Din Hamadani1
- Raymond of Sabunde1
- Raymundus de Salgis1
- Regiomontanus1
- Remigio dei Girolami1
- René of Anjou1
- Reynoldus Romanus1
- Richard Bolter1
- Richard Burdet1
- Richard II of England1
- Richard Nykke1
- Richard Treby1
- Richard de Fournival1
- Richard of Middleton1
- Robert de Saint-Martin1
- Roberto Caracciolo1
- Robine Bordinelle1