Friedrich of Saxe-Altenburg
Friedrich von Sachsen-Altenburg is the name of the following people:
- Friedrich von Sachsen-Altenburg (1599–1625) , titular Duke of Sachsen-Altenburg and officer
- Friedrich von Sachsen-Altenburg (1801–1870) , Prince of Sachsen-Altenburg
- Friedrich (Sachsen-Altenburg) (1763–1834), Duke of Saxe-Hildburghausen and Duke of Saxe-Altenburg
- Friedrich I (Saxe-Gotha-Altenburg) (1646–1691), Duke of Saxe-Altenburg
- Friedrich II (Saxe-Gotha-Altenburg) (1676–1732), Duke of Saxe-Altenburg
- Friedrich III. (Saxe-Gotha-Altenburg) (1699–1772), Duke of Saxe-Altenburg
- Friedrich IV (Saxe-Gotha-Altenburg) (1774–1825), Duke of Saxe-Altenburg
- Friedrich Wilhelm I (Saxe-Weimar) (1562–1602), Duke of Saxe-Weimar-Altenburg
- Friedrich Wilhelm II (Sachsen-Altenburg) (1603–1669), Duke of Sachsen-Altenburg
- Friedrich Wilhelm III. (Saxony-Altenburg) (1657–1672), Duke of Saxony-Altenburg
