Il est marié avec Charlotte Georgine von Mecklenburg-Strelitz.
Ils se sont mariés le 3 septembre 1785 à Hildburghausen, Thüringen, Germany, il avait 22 ans.
Enfant(s):
Saxony-Altenburg (1826-1918)
The Duchy of Saxony-Altenburg was reformed in 1826 after the death of Friedrich IV of Saxony-Gotha-Altenburg, which led to a reorganisation of the Saxon lands. It went to the Duke of Saxony-Hildburghausen, who changed his title to that of Duke of Saxony-Altenburg. Part of the Prussian party since 1862, the Duchy disappeared in 1918, when Ernst II abdicated, and was incorporated the following year into Thuringia.
1826-1834 Friedrich (1763-1834); son of Ernst Friedrich III of Saxony-Hildburghausen; he was at first Duke of Saxony-Hildburghausen (1780-1826), after his father, and took the title of Duke of Saxony-Altenburg in 1826; he was succeeded by his son.
Les données affichées n'ont aucune source.