What was the title of the father of this sovereign duke of the Duchy of Saxe-Coburg and Gotha who composed the opera "Diana von Solange"?
Diana von Solange: Diana von Solange is an opera by the German prince Ernst II of Saxe-Coburg-Gotha, an amateur composer. Ernest II, Duke of Saxe-Coburg and Gotha: Ernest II (German: "Ernst August Karl Johann Leopold Alexander Eduard"; 21 June 1818 – 22 August 1893) was the sovereign duke of the Duchy of Saxe-Coburg and Gotha, reigning from 1844 to his death. Ernest II, Duke of Saxe-Coburg and Gotha:  Ernest was born in Coburg as the eldest child of Ernest I, Duke of Saxe-Coburg-Saalfeld, and his duchess, Princess Louise of Saxe-Gotha-Altenburg.
Duke of Saxe-Coburg-Saalfeld