 They wed in Paris on 9 October 1921.Theirs was seen as a splendid match and the couple was an influential one in New York's Long Island North Shore society, where they lived at their estate, Kenwood, in Oyster Bay.Xenia and William had a daughter on 25 February 1925, Nancy Helen Marie Leeds, who married Edward Judson Wynkoop Jr. in December 1945.