[8] During World War II, the Duke and Duchess remained in Paris during the German occupation.
After the liberation of Paris, his widow received a citation from the United States government for Red Cross activities before she returned to her native homeland in 1947.
[9] On 10 January 1894, he married Marie Thérèse d'Albert de Luynes (1876–1941)[10] in the Chapel of the Convent of the Sacred Heart.
[11][12] She was the only daughter of Princess Sophie Galitzine, and Paul d'Albert de Luynes, Duke of Chaulnes and Picquigny, who both died young.
[13] Her only sibling, Emmanuel d'Albert de Luynes, died shortly after his marriage to American heiress Theodora Mary Shonts in 1908.