Friedrich Wilhelm of Saxe-Altenburg
Friedrich Wilhelm von Sachsen-Altenburg is the name of the following people:
- Friedrich Wilhelm II (Sachsen-Altenburg) (1603–1669), Duke of Sachsen-Altenburg
- Friedrich Wilhelm III. (Saxony-Altenburg) (1657–1672), Duke of Saxony-Altenburg
See also:
- Friedrich Wilhelm I (Saxe-Weimar) (1562–1602), Duke of Saxe-Weimar-Altenburg
