Prince Otto of Hesse and by Rhine German archaeologist (1937-1998) (1937–1998) Parents Princess Mafalda of Savoy Prince Philipp, Landgrave of Hesse Children Siblings Elisabeth Margarethe Prinzessin von Hessen-Kassel Prince Heinrich of Hesse and by Rhine Prince Moritz, Landgrave of Hesse Partners Angela von Doering Elisabeth Bonker