The daughter of Charles Louis Fouché, 4th duc d'Otrante (a descendant of Napoleonic statesman Joseph Fouché), and his first wife, Countess Hedvig Ingeborg Madeleine Douglas (a descendant of Louis I, Grand Duke of Baden), she was born Margareta Fouché d'Otrante in Elghammar, Sweden.
•
Margareta Fouché d'Otrante, Princess of Sayn-Wittgenstein-Berleburg (28 March 1909 – 25 August 2005) was the wife of Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg, and mother of Richard, 6th Prince of Sayn-Wittgenstein-Berleburg, who married Princess Benedikte of Denmark.
Under the French name of Otrante it was created a duché grand-fief de l'Empire in the Napoleonic kingdom of Naples for Joseph Fouché, Napoleon's minister of Police (1809), the grandfather of Margareta Fouché.
Prince Robin Alexander Wolfgang Udo Eugen Wilhelm Gottfried of Sayn-Wittgenstein-Berleburg (born 29 January 1938 in Gießen, Germany) is the son of Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg and his wife, Franco-Swedish noblewoman Margareta Fouché d'Otrante.
Princess Tatiana Louise Ursula Therese Elsa of Sayn-Wittgenstein-Berleburg (born 31 July 1940) is the fourth child and second daughter of Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg, and his wife, Margareta Fouché d'Otrante, and younger sister of Prince Richard of Sayn-Wittgenstein-Berleburg, the husband of Princess Benedikte of Denmark.