John William Friso is the most recent common ancestor of what
John William Friso, Prince of Orange John William Friso, Prince of Orange-Nassau (Dutch: "Johan Willem Friso van Oranje-Nassau" ; 14 August 1687 – 14 July 1711) became the titular Prince of Orange in 1702. He was stadtholder of Friesland until his death by drowning in the Hollands Diep in 1711. Friso and his wife, Marie Louise, are ancestors of all European monarchs occupying the throne today.
Plunkett-Ernle-Erle-Drax Plunkett-Ernle-Erle-Drax is the quadruple-barrelled surname of the descendants of Admiral The Honourable Sir Reginald Aylmer Ranfurly Plunkett-Ernle-Erle-Drax (1880–1967), who was the younger son of John William Plunkett, 17th Baron of Dunsany by his wife Ernle Elizabeth Louisa Maria Grosvenor, née Burton, later Ernle-Erle-Drax (1855–1916). The surname of Plunkett-Ernle-Erle-Drax was assumed in lieu of Plunkett, his name from birth, by royal licence on 4 October 1916. Ernle is pronounced "earnly." The current head of the family is the Westminster M.P. Richard Grosvenor Plunkett-Ernle-Erle-Drax, otherwise Richard Drax.