Question: Who is Johann Wilhelm, Duke Of Saxe-Jena's paternal grandmother?
Sentence (from "Johann Wilhelm, 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.
Relevant evidence: Yes