HM George I's 10-Great Half-Uncle. HRE Ferdinand I's 6-Great Half-Uncle. HRE Charles VI's 11-Great Half-Uncle. U.S. President [L.B. JOHNSON]'s 20-Great Half-Uncle. PM Churchill's 19-Great Half-Uncle. HRH Albert II's 20-Great Grandfather. HM Juan Carlos' 18-Great Grandfather. Philippe of Belgium's 16-Great Grandfather. Grand Duke Henri's 16-Great Grandfather. Poss. Jamie's 21-Great Uncle.