Author
- Qāḍī Zāda al-Rūmī1
- Ranuccio Farnese1
- Regiomontanus1
- Ressani family1
- Richard Ward1
- Roman Catholic Archdiocese of Siena1
- Saadi1
- Safi al-Din al-Urmawi1
- Sangalletti family1
- Sebastian Schindler1
- Shams al-Dīn Shāfiʻī1
- Simone Gondi1
- Sirāj al-Dīn Abū Ḥafṣ ʻUmar Ibn al-Wardī1
- Sixtus V1
- Stefano d'Andrea1
- Tartaleoni family1
- Thomas More1
- Tommaso Ridolfi1
- Torelli family1
- Uguccioni family1