William of Montferrat
Wilhelm von Montferrat is the name of the following ruler:
- William of Montferrat (Jaffa and Askalon) (1135 / 1145–1177), Count of Jaffa and Askalon
- Wilhelm V (Montferrat) (before 1136–1191), Margrave of Montferrat
- William VI. (Montferrat) († 1225), Margrave of Montferrat
- Wilhelm VII (Montferrat) († 1292), Margrave of Montferrat
- Wilhelm XI. (Montferrat) (1486–1518), Margrave of Montferrat