 Johann Wilhelm, Duke of Saxe-Jena

Johann Wilhelm, Duke of Saxe-Jena (Jena, 28 March 1675 – Jena, 4 November 1690), was a duke of Saxe-Jena.He was the youngest but sole surviving son of Bernhard II, Duke of Saxe-Jena by his wife Marie Charlotte, daughter of Henry de La Trémoille, 3rd Duke of Thouars, 2nd Duke of La Tremoille, and Prince of Talmond and Taranto.