Author
- Porphyry2
- Pseudo Bernard of Clairvaux2
- Pseudo-Bonaventure2
- Pseudo-Joachim of Fiore2
- Qadi Mir Husayn al-Maybudi2
- Raghunātha2
- Ramon Llull2
- Ranulf Higden2
- Rashid-al-Din Hamadani2
- Regiomontanus2
- Ressani family2
- Richard de Saint-Laurent2
- Richard of Middleton2
- Richard of Saint Victor2
- Riyazi2
- Robert Cooke2
- Rutilius Taurus Aemilianus Palladius2
- Rāmacandrabhaṭṭa2
- Rāmakr̥ishṇa Bhaṭṭa2
- Rāmānandasarasvatī2