Namesakes
Johannes Tzimisces
(a.k.a. Ioannes) (m) 925-976 
Roman and Byzantine Emperors 969-976
Johannes Comnenus
(a.k.a. Ioannes) (m) 1087-1143
Roman and Byzantine Emperors 1118-1143
Johannes Ducas Lascaris
(a.k.a. Ioannes) (m) 1250-1305
Roman and Byzantine Emperors 1258-1261
Johannes Cantacuzenus
(a.k.a. Ioannes) (m) 1292-1383
Roman and Byzantine Emperors 1341-1354
Johannes Palaeologus
(a.k.a. Ioannes) (m) 1370-1408
Roman and Byzantine Emperors 1390
Johannes Palaeologus
(a.k.a. Ioannes) (m) 1392-1448
Roman and Byzantine Emperors 1425-1448
Johannes Ducas Vatatzes
(a.k.a. Ioannes) (m) 1192-1254
Roman and Byzantine Emperors 1221-1254
John I
(a.k.a. Iôannês) (m) 4xx-505
Coptic Popes and Patriarchs of Alexandria 496-505
John II
(a.k.a. Iôannês) (m) 4xx-516
Coptic Popes and Patriarchs of Alexandria 505-516
John I
(a.k.a. Ioannes) (m) 470-526
Bishops of Rome and the Popes 523-526
John II
(a.k.a. Ioannes) (m) 470-535
Bishops of Rome and the Popes 533-535
John III
(a.k.a. Ioannes) (m) ?-574
Bishops of Rome and the Popes 561-574
John V
(a.k.a. Ioannes) (m) 635-686
Bishops of Rome and the Popes 685-686
John IV
(a.k.a. Ioannes) (m) ?-642
Bishops of Rome and the Popes 640-642
John III
(a.k.a. Iôannês) (m) 6xx-689
Coptic Popes and Patriarchs of Alexandria 680-689
John VII
(a.k.a. Ioannes) (m) 650-707
Bishops of Rome and the Popes 705-707
John VI
(a.k.a. Ioannes) (m) 655-705
Bishops of Rome and the Popes 701-705
John IV
(a.k.a. Iôannês) (m) 7xx-799
Coptic Popes and Patriarchs of Alexandria 777-799
John VIII
(a.k.a. Ioannes) (m) ?-882
Bishops of Rome and the Popes 872-882
John IX
(a.k.a. Ioannes) (m) ?-900
Bishops of Rome and the Popes 898-900
John XI
(a.k.a. Ioannes) (m) 910-935
Bishops of Rome and the Popes 931-935
John X
(a.k.a. Ioannes) (m) ?-928
Bishops of Rome and the Popes 914-928
John XIII
(a.k.a. Ioannes) (m) c. 930-972
Bishops of Rome and the Popes 965-972
John XII
(a.k.a. Ioannes) (m) 937-964
Bishops of Rome and the Popes 955-964
John
(a.k.a. Ioannes) (m) c. 945-1001
Bishops of Rome and the Popes 997-998
John XIV
(a.k.a. Ioannes) (m) ?-984
Bishops of Rome and the Popes 983-984
John XV
(a.k.a. Ioannes) (m) ?-996
Bishops of Rome and the Popes 985-996
John XVII
(a.k.a. Ioannes) (m) ?-1003
Bishops of Rome and the Popes 1003
John XVIII
(a.k.a. Ioannes) (m) ?-1009
Bishops of Rome and the Popes 1003-1009
John XIX
(a.k.a. Ioannes) (m) ?-1032
Bishops of Rome and the Popes 1024-1032
John V
(a.k.a. Iôannês) (m) c. 1100-1166
Coptic Popes and Patriarchs of Alexandria 1147-1166
John VI
(a.k.a. Iôannês) (m) 11xx-1216
Coptic Popes and Patriarchs of Alexandria 1189-1216
John XXI
(a.k.a. Ioannes) (m) c. 1215-1277
Bishops of Rome and the Popes 1276-1277
John XXII
(a.k.a. Ioannes) (m) 1244-1334
Bishops of Rome and the Popes 1316-1334
John VII
(a.k.a. Iôannês) (m) 12xx-1293
Coptic Popes and Patriarchs of Alexandria 1262-1269; 1271-1293
John VIII
(a.k.a. Iôannês) (m) 12xx-1320
Coptic Popes and Patriarchs of Alexandria 1300-1320
John IX
(a.k.a. Iôannês) (m) 12xx-1327
Coptic Popes and Patriarchs of Alexandria 1320-1327
John X
(a.k.a. Iôannês) (m) c. 1300-1369
Coptic Popes and Patriarchs of Alexandria 1363-1369
John XI
(a.k.a. Iôannês) (m) 13xx-1452
Coptic Popes and Patriarchs of Alexandria 1427-1452
John
(a.k.a. Ioannes) (m) c. 1370-1419
Bishops of Rome and the Popes 1410-1415
John XII
(a.k.a. Iôannês) (m) 14xx-1483
Coptic Popes and Patriarchs of Alexandria 1480-1483
John XIII
(a.k.a. Iôannês) (m) 14xx-1524
Coptic Popes and Patriarchs of Alexandria 1484-1524
John XVII
(a.k.a. Iôannês) (m) 1xxx-1745
Coptic Popes and Patriarchs of Alexandria 1727-1745
John XIV
(a.k.a. Iôannês) (m) 15xx-1586
Coptic Popes and Patriarchs of Alexandria 1571-1586
John XV
(a.k.a. Iôannês) (m) 15xx-1629
Coptic Popes and Patriarchs of Alexandria 1619-1629
John XVI
(a.k.a. Iôannês) (m) 16xx-1718
Coptic Popes and Patriarchs of Alexandria 1676-1718
John XVIII
(a.k.a. Iôannês) (m) 17xx-1796
Coptic Popes and Patriarchs of Alexandria 1769-1796
John XIX
(a.k.a. Iôannês) (m) 1855-1942
Coptic Popes and Patriarchs of Alexandria 1928-1942
John XXIII
(a.k.a. Ioannes) (m) 1881-1963
Bishops of Rome and the Popes 1958-1963
Saints
John Paul I
(a.k.a. Ioannes) (m) 1912-1978
Bishops of Rome and the Popes 1978
John Paul II
(a.k.a. Ioannes) (m) 1920-2005
Bishops of Rome and the Popes 1978-2005
Saints
John Ducas Vatatzes
(a.k.a. Ioannes) (m) 1192-1254
Saints
Johannes Palaeologus; John V Palaeologus
(a.k.a. Ioannes) (m) 1332-1391
Roman and Byzantine Emperors 1341-1376; 1379-1390; 1390-1391
Tornike Eristavi
(a.k.a. Ioannes) (m) c. 920-985
Saints