Ernst August II Konstantin, Duke of Saxe-Weimar-Eisenach, was a duke of Saxe-Weimar-Eisenach. Wikipedia
Born: June 2, 1737, Weimar, Germany
Died: May 28, 1758 (age 20 years), Weimar, Germany
Spouse: Duchess Anna Amalia of Brunswick-Wolfenbüttel (m. 1756–1758)