William the Rich
William the Rich designates the following people:
- Wilhelm II. (Meißen) (1371–1425), son of Margrave Friedrich des Strengen and Katharina von Henneberg
- Wilhelm (Nassau) (1487–1559), Count of Nassau-Dillenburg, Siegen, Vianden and Dietz
- Wilhelm (Jülich-Kleve-Berg) (1516–1592), Duke of Jülich-Kleve-Berg and Count of Mark and Ravensberg