Author
- Sicco Polenton1
- Sidrac1
- Sigismund1
- Simeon ben Zemah Duran1
- Simon Bredon1
- Siraj al-Din al-Bulqini1
- Sirāj al-Dīn Abū Ḥafṣ ʻUmar Ibn al-Wardī1
- Stefano Fieschi1
- Suetonius1
- Tabrīzī, ḥasan ibn Sharaf, d. 13681
- Taftāzānī, Masʻūd ibn ʻUmar, 1322-1389?1
- Taj al-Din al-Subki1
- Taqī al-Dīn Abū Bakr ibn Muḥammad al-Ḥiṣnī1
- Thomas de Littleton1
- Thomas à Kempis1
- Titus Livius1
- Todros ben Joseph Abulafia1
- Umbertus Decembrius1
- Urban V1
- Usuard1