Author
- 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
- Uthman bin Ali Zayla'i1
- Walter Burley1
- Walter Hilton1
- Werner Rolevinck1
- William Langland1
- William Perault1
- William de Montibus1
- William of Montlauzun1
- William of Nangis1
- William of Paris1
- Xenophon1
- Yahya ibn Imad bin Yahya al-Munajjim al-Kashi1