Ernst Anton Karl Ludwig Herzog von Sachsen-Coburg und Gotha ) (1784 – 1844) was a duke of Saxe-Coburg-Saalfeld and, from 1826, the first sovereign duke of  Saxe-Coburg and Gotha . He was the eldest son of  Francis, Duke of Saxe-Coburg-Saalfeld , and  Countess Augusta of Reuss-Ebersdorf . His younger brother,  Leopold Georg Christian Frederick