Marie Alix, Duchess of Schleswig-Holstein German noble (1923–2021) Parents Prince Stefan of Schaumburg-Lippe Ingeborg Alix von Oldenburg Children Marita von Schleswig-Holstein-Sonderburg-Glücksburg Alexander Prinz zu Schleswig-Holstein-Sonderburg-Glücksburg Prince Christoph of Schleswig-Holstein Ingeborg zu Schleswig-Holstein Siblings Georg-Moritz Prinz zu Schaumburg-Lippe unnamed son zu Schaumburg-Lippe Partners Peter, Duke of Schleswig-Holstein