HM Juan Carlos' 13-Great Aunt. Philippe of Belgium's 13-Great Aunt. Grand Duke Henri's 13-Great Aunt. HM Margrethe II's 12-Great Aunt. HM Beatrix's 12-Great Aunt. HM Constantine II's 13-Great Aunt. HM Carl XVI Gustaf's 13-Great Aunt. HM Harald V's 12-Great Aunt. `Red Baron' Richthofen's 11-Great Grandmother.