Elisabeth Margarethe Prinzessin von Hessen-Kassel German princess (born 1940) (b. 1940) Parents Prince Philipp, Landgrave of Hesse Princess Mafalda of Savoy Children Alexander Graf von Oppersdorff Friedrich Karl Graf von Oppersdorff Siblings Prince Otto of Hesse and by Rhine Prince Moritz, Landgrave of Hesse Prince Heinrich of Hesse and by Rhine Partners Friedrich Carl von Oppersdorf