Friedrich Wilhelm of Nassau-Siegen
Friedrich Wilhelm von Nassau-Siegen is the name of the following people:
- Friedrich Wilhelm I. Adolf von Nassau-Siegen (1680–1722), Prince of Nassau-Siegen, see Friedrich Wilhelm I. Adolf (Nassau-Siegen)
- Friedrich Wilhelm II of Nassau-Siegen (1706–1734), last prince of Nassau-Siegen from the Reformed line, see Friedrich Wilhelm II. (Nassau-Siegen)