Parents
- Karl Alfred de Croÿ (1859 - 1906), duc de Croÿ
- Ludmilla d'Arenberg (1870 - 1953)
Family
- Married on October 27, 1913 in Versoix, with Nancy Leishman (1894 - 1983), issuing
Carl-Emanuel (1914 - 2011)
Private
- Married on October 23, 1924 in Munich, with Helene Lewis (1898 - )
- Married on January 28, 1933 in Berlin, with Marie Louise Wiesner (1904 - 1945), issuing
- Clemens (1934 - 2013)