Friedrich III. von Sachsen-Gotha-Altenburg, Herzog von Sachsen-Gotha-Altenburg, Administrator des Herzogtums Sachsen-Weimar-Eisenach, was born 14 April 1699 in Gotha, Thuringia, Germany to Friedrich II. von Sachsen-Gotha-Altenburg (1676-1732) and Magdalena Augusta von Anhalt-Zerbst (1679-1740) and died 10 March 1772 Gotha, Thuringia, Germany of unspecified causes. He married Luise Dorothea von Sachsen-Meiningen (1710-1767) 17 September 1729 in Gotha, Thuringia, Germany.
Children
| Name | Birth | Death | Joined with |
| Friedrich Ludwig von Sachsen-Gotha-Altenburg (1735-1756) | |||
| Ludwig von Sachsen-Gotha-Altenburg (1735-1735) | |||
| Friederike Luise von Sachsen-Gotha-Altenburg (1741-1776) | |||
| Ernst II. von Sachsen-Gotha-Altenburg (1745-1804) | 30 January 1745 Gotha, Thuringia, Germany | 20 April 1804 Gotha, Thuringia, Germany | Charlotte von Sachsen-Meiningen (1751-1827) |
| Sofie von Sachsen-Gotha-Altenburg (1746-1746) | |||
| August von Sachsen-Gotha-Altenburg (1747-1806) | |||
Footnotes (including sources)
| ‡ General |
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