Author
- Remigius of Auxerre2
- Ressani family2
- Richard de Saint-Laurent2
- Richard of Middleton2
- 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
- Satyāṣāḍha2
- Sayf al-Din al-Amidi2
- Sayf al-Dīn Aḥmad Abharī2