Ernest Frederick I, Duke of Saxe-Hildburghausen, was a duke of Saxe-Hildburghausen.
He was the eldest son of Ernest, Duke of Saxe-Hildburghausen and Countess Sophie Henriette of Waldeck. Wikipedia
Born: August 21, 1681, Gotha, Germany
Died: March 9, 1724 (age 42 years), Hildburghausen, Germany
Great-grandparents: Johann II, Duke of Saxe-Weimar, Dorothea Maria of Anhalt, Wolrad IV, Count of Waldeck-Eisenberg, and more
Spouse: Countess Sophia Albertine of Erbach-Erbach (m. 1704–1724)