. "William XIII" . . "William" . "William IX" . "William I of Hesse" . . . . "William I" . "Landgraf Wilhelm von Hessen-Kassel" . . "Landgrave Wilhelm (William) IX of Hesse" . "William of Hesse-Kassel" . . . . . "Landgrave Wilhelm" . "Count William" . . "elector William I" . . "Wilhelm IX" . "Landgrave William IX of Hesse-Kassel (or Hesse-Cassel)" . "William I, Elector of Hesse" . "Der Kurf\u00FCrst von Hessen" . . "Hereditary Landgrave William" . . "Elector of Hesse" . "William I of Hesse-Kassel" . "1743" . "prince-elector William" . . . . "William of Hesse" . . . "0031" . "Landgrave and Elector of Hesse" . "Landgrave William IX of Hesse" . . "Prince William of Hesse" . "Prince William IX" . . . "uncle" . "Prince of Hesse" . "Wilhelm I, Elector of Hesse" . . . . . . . . "Wilhelm IX/I of Hesse-Kassel" . "William IX, Landgrave of Hesse-Kassel" . "Wilhelm I" . . "William I, Elector of Hesse" . "The Hereditary Prince of Hesse-Cassel" . . "1785" . . . . "Landgrave of Hesse-Kassel" . . . . . "Wilhelm (William) IX, Landgrave of Hesse" . "Prince William" . . "1821" . "Hereditary Prince William, Ruling Count of Hesse-Hanau" . . . . . "Wilhelm, the then heir apparent of Hanau" . . . . "Wilhelm I., Kurf\u00FCrst von Hessen" . . .