Sophie Elisabeth (b. Gotha, 19 May 1663 – d. Gotha, 23 May 1663). Their eldest son Frederick was the first to inherit this title. His granddaughter from this son, Anna Sophie of Saxe-Gotha-Altenburg, was a direct matrilineal ancestor of Nicholas II of Russia. His younger son Johann Ernest was father of Franz Josias, Duke of Saxe-Coburg-Saalfeld.
Charlotte married Ernest, Hereditary Prince of Saxe-Gotha-Altenburg (later Duke of Saxe-Gotha-Altenburg), son of Frederick III, Duke of Saxe-Gotha-Altenburg and his wife Luise Dorothea of Saxe-Meiningen, on 21 March 1769 in Meiningen. Charlotte and Ernest had four children: Ernest, Hereditary Prince of Saxe-Gotha-Altenburg (b.