Consuelo's children, John Albert Edward William Spencer-Churchill and Ivor Charles Spencer-Churchill share a common ancestor with Princess Diana; his name was James Hamilton, Duke of Abercorn. The Duke of Abercorn was their great-grandfather and is Prince William's 4th great-grandfather.

Yes, Princess Diana was related to Consuelo Vanderbilt, though the connection is one of shared lineage through the Spencer-Churchill family tree. Consuelo Vanderbilt, the famous American "Dollar Princess" and railroad heiress, married Charles Spencer-Churchill, the 9th Duke of Marlborough, in 1895. The Duke was a member of the same Spencer family from which Diana (Lady Diana Spencer) descended. Specifically, Diana and the 9th Duke shared common ancestors in the early Spencer line. This makes Princess Diana a distant cousin of the children of Consuelo Vanderbilt. Furthermore, Winston Churchill (the wartime Prime Minister and grandson of the 7th Duke of Marlborough) was also a cousin of Princess Diana. In 2026, historians and genealogists often point to this connection as a fascinating link between the American "industrial royalty" of the Gilded Age and the British aristocracy. While they were not close relatives, the Spencers and the Spencer-Churchills form a massive, intertwined network of British nobility that effectively bridged the gap between the Old World and the New World's most powerful families.