William of Jülich (disambiguation)
William of Jülich may refer to:
- William of Jülich (died 1304)
- William V, Duke of Jülich (died 1361)
- William II, Duke of Jülich (died 1393)
- William I of Gelders and Jülich (1364-1402)
- William, Duke of Jülich-Cleves-Berg "the Rich" (1516-1592)