Fürst zu Eulenburg und Hertefeld Graf von Sandels (Starnberg, 19 September 1881 - Weeze, 1 August 1963), married at Liebenberg, 21 May 1904 Marie Freiin Mayr von Melnhof (Vienna, 8 April 1884 - Weeze, 3 February 1960)
She was born as Countess Rosita in Madrid, Spain, the younger daughter of Count Carl Douglas (1908-1961), a Swedish nobleman and diplomat who was Royal Swedish Ambassador to Brazil, and his Prussian wife Ottora Maria Haas-Heye (1910-2001), maternal granddaughter of Philip, Prince of Eulenburg and Hertefeld, by his wife Augusta, countess Sandels.