Her sister, Marthe Leishman, a favorite of King George V and a close friend of Cole Porter and Francis Poulenc, married twice, first to Count Louis de Gontaut-Biron and, after his death, to American heir James Hazen Hyde. Her brother, John Leishman Jr., married, and divorced, New York socialite Elizabeth Helene Demarest.
Her paternal grandparents were John Leishman and Amelia (née Henderson) Leishman, and her maternal grandparents were Edward Crawford and Nancy Harriet (née Ferguson) Crawford.
Nevertheless, Nancy and Karl married on 24 October 1913 at Versoix, Canton of Geneva, Switzerland. As a result of the impasse between the Kaiser and her father over her marriage to Croÿ, her father left his post in Berlin in 1913 and retired to private life. Before their divorce in 1922, Nancy and Karl were the parents of:[citation needed]
Princess Antoinette Emma Laurenzia Charlotte Ludmille Juliette Marthe Helene Sabina von Croÿ (b. 1915), who married Jurgen von Gorne in 1944. They divorced in 1947, and she married Frederick Nelson Tucker in 1948. They divorced in 1956, and she married Douglas Auff'm-Ordt in 1981.
Princess Marie-Luise Natalie Engelberta Ludmilla Nancy Julie von Croÿ (b. 1919), who married Richard Metz, a son of Herman A. Metz, in 1941. They divorced in 1949, and she married H. Nelson Slater III in 1952. After his death in 1968, she married Frederick Baldwin Adams Jr., son of Frederick Baldwin Adams and Ellen (née Delano) Adams (a first cousin of President Franklin D. Roosevelt), in 1969.
Villa Waldfriede, Wiesbaden, 1892
After the divorce, she lived for three years in the Villa Waldfriede in Wiesbaden. She married, secondly, Markus Andreas d'Oldenburg (1877–1939), a Danish diplomat and son of Valdemar Oldenburg. Regardless of the opposition to her first marriage, her son Carl was eventually deemed eligible to inherit the properties of the Croÿ family upon Karl's death in 1974, when Carl became the 14th Duke von Croÿ.
She died on 22 February 1983 at age 88 in Copenhagen, Denmark. Through her son Carl, 14th Duke von Croÿ, she was a grandmother of Rudolf, 15th Duke von Croÿ (b. 1955), who married Alexandra, a member of the Miloradović noble family.[citation needed]
↑Karl, 13th Duke von Croÿ (1899–1974) was a son of Karl Alfred, 12th Duke von Croÿ, and Princess Ludmilla von Arenberg (eldest daughter of Engelbert, 8th Duke of Arenberg). The Croÿ dynastic house, which originally adopted its name from the Château de Crouy-Saint-Pierre in French Picardy, claimed descent from the Hungarian Prince Marc (great-grandson of King Géza II of Hungary), who allegedly settled in France in 1147, where he married an heiress to the barony of Croÿ. The Croÿ family rose to prominence under the Dukes of Burgundy.
↑After their divorce, Karl married another American, Helen Lewis, in 1924. They divorced in 1930, and he married, thirdly, Marie Louise Wiesner in 1933. They were the parents of Clemens Franz Carl Anslem Prinz von Croÿ (b. 1934). After her death in 1945, he married Hildegard von Guerard in 1949.
↑Beard, Patricia (2009). After the Ball: Gilded Age Secrets, boardroom betrayals, and the party that ignited the Great Wall Street Scandal of 1905. Xlibris Corp. ISBN978-1436357852.