Ernest I, Duke of Saxe-Gotha
Member of the House of Wettin
Ernest I, called "Ernest the Pious" was a duke of Saxe-Gotha and Saxe-Altenburg. The duchies were later merged into Saxe-Gotha-Altenburg.
He was the ninth but sixth surviving son of Johann II, Duke of Saxe-Weimar, and Dorothea Maria of Anhalt. Wikipedia
Born: December 25, 1601, Altenburg, Germany
Died: March 26, 1675 (age 73 years), Schloss Friedenstein Gotha, Gotha, Germany
Parents: Dorothea Maria of Anhalt and Johann II, Duke of Saxe-Weimar
Great-grandparents: John Frederick I, Sibylle of Cleves, Frederick III, Elector Palatine, and more