HM George I's 11-Great Half-Uncle. HRE Ferdinand I's 7-Great Half-Uncle. HRE Charles VI's 12-Great Half-Uncle. U.S. President [L.B. JOHNSON]'s 21-Great Half-Uncle. HRH Charles's 18-Great Grandfather. PM Churchill's 20-Great Half-Uncle. HRH Albert II's 21-Great Grandfather. HM Juan Carlos' 18-Great Grandfather. Poss. Jamie's 22-Great Uncle.