Johann Wilhelm, Duke o Saxe-Jena
|Duke o Saxe-Jena|
|Successor||Duchy divided between Saxe-Weimar an Saxe-Eisenach|
|Born||28 Mairch 1675|
|Dee'd||4 November 1690 (aged 15)|
|Hoose||Hoose o Wettin|
|Faither||Bernhard II, Duke o Saxe-Jena|
|Mither||Marie Charlotte de la Trémoille|
Johann Wilhelm, Duke o Saxe-Jena (28 Mairch 1675 – 4 November 1690), wis a duke o Saxe-Jena.
He wis the youngest but sole surviving son o Bernhard II, Duke o Saxe-Jena bi his wife Marie Charlotte, dochter o Henry de La Trémoille, 3rd Duke o Thouars, 2nt Duke o La Tremoille, an Prince o Talmond an Taranto. As Johann Wilhelm lived anly fifteen years an failed tae reach adulthood, he never governed. With his daith the line o the Dukes o Saxe-Jena haed become extinct, an the duchy wis divided atween Saxe-Weimar an Saxe-Eisenach.