John F. A. Cecil ( George and Cornelia Stuyvesant Vanderbilt 's only child ) married British aristocrat , William Cecil , a descendant of Edith Vanderbilt in 1924 .
Cornelia Stuyvesant Vanderbilt ( the only child of George and Edith Vanderbilt ) married in 1924 to the British aristocrat John F. A. Cecil , a descendant of William Cecil .