Author
- Rajab al-Bursi2
- Raphael Berdugo2
- Rashid-al-Din Hamadani2
- Regiomontanus2
- Remigius of Auxerre2
- Ressani family2
- Richard de Saint-Laurent2
- Riyazi2
- Robert Holkot2
- Rodrigo Sánchez de Arévalo2
- Roger Alban2
- Royal Chancellery of Granada2
- Rutilius Taurus Aemilianus Palladius2
- Rāmacandrabhaṭṭa2
- Rāmakr̥ishṇa Bhaṭṭa2
- Rāmānandasarasvatī2
- Sabit Alaeddin Ali2
- Salamah ben Musa ben Yitsḥaḳ2
- Salīm Mawṣilī2
- Samuel ben Hofni2