Ernest Frederick I , Duke of Saxe-Hildburghausen ( Gotha , 21 August 1681 - Hildburghausen , 9 March 1724 ) , was a duke of Saxe-Hildburghausen .
Ernst Frederick I , Duke of Saxe-Hildburghausen ( Gotha , 21 August 1681 - Hildburghausen , 9 March 1724 ) , was a duke of Saxe-Hildburghausen .