Roberts, Gary Boyd. "Newly Discovered American Cousins of the Duke and Duchess of Cambridge", in American Ancestors. (Boston, MA: New England Historic Genealogical Society).
John and Elizabeth are ancestors of President William Howard Taft, as well as Harvard President Josiah Quincy, Upton Sinclair, Sandra Day O'Connor, and actor Robert Montgomery. Elizabeth provides the title's connection to the Duchess; her grandmother's sister, Frances Eure, is 13g grandmother of the Duchess.
