William August, Duke of Saxe-Eisenach
Wilhelm August, Duke of Saxe-Eisenach was a duke of Saxe-Eisenach.
He was born at Eisenach, the youngest and only surviving son of Adolf Wilhelm, Duke of Saxe-Eisenach and Marie Elisabeth of Brunswick-Wolfenbüttel.
All his older brothers died before his father, and Wilhelm August, the fifth and youngest child, was born nine days after the death of Adolf Wilhelm and succeeded him in the duchy of Saxe-Eisenach from the moment of his birth, under the guardianship of his uncle Johann Georg.
A sickly boy, he died at Eisenach when only two years old, and Eisenach was inherited by Johann Georg.
