Author
- Willem Vrelant1
- William Bourne1
- William Brito1
- William IV, Landgrave of Hesse-Kassel1
- William Lee1
- William Lyndwood1
- William Roper1
- William Rothwell1
- William of Auxerre1
- William of Malmesbury1
- William of Ockham1
- William of Paris1
- William of St-Thierry1
- William of Waddington1
- Wāḥidī Nīsābūrī1
- Xenophon1
- Yahya Saleh1
- Yahya bey Dukagjini1
- Yajnavalkya1
- Yakov Sikily1