Author
- Sibṭ ibn al-ʻAjamī1
- Sicco Polenton1
- Sidrac1
- Sigmund Hintterkircher1
- Sikandar Āmulī1
- Simon of Cremona1
- Simone Gondi1
- Sinan Efendi1
- Sinan Paşa1
- Sir Thomas Frankland, 2nd Baronet1
- Sirāj al-Dīn Abū Ḥafṣ ʻUmar Ibn al-Wardī1
- Sixtus IV1
- Society of Saint Anne (Malogoszcz, Poland)1
- Solomon Almoli1
- Solomon Dubno1
- Solomon ben Samuel Ibn Muvhar1
- Solomon ibn Gabirol1
- Somayāji Rāmacandra1
- Spain1
- Srinatha1