Author
- Shlomo ben Aderet1
- Sidrac1
- Siena1
- Sigebert of Gembloux1
- Sigismund1
- Sirāj al-Dīn Abū Ḥafṣ ʻUmar Ibn al-Wardī1
- Sixtus V1
- Society of Jesus1
- Society of Saint Anne (Malogoszcz, Poland)1
- Somayāji Rāmacandra1
- Sriharsha1
- Stefano d'Andrea1
- Stephanus Hugoneti1
- Sureśvarācārya1
- Sylvester II1
- Taftazani1
- Taj al-Din al-Subki1
- Taqī al-Dīn Muḥammad ibn Aḥmad Ibn al-Najjār1
- Theobaldus Episcopus1
- Thomas Aquinas1