John VI

John VI may refer to:

• Pope John VI, Pope from 701 to his death in 705
• Ecumenical Patriarch John VI of Constantinople, Patriarch from 712 to 715
• John VI Sarigta, Syriac Patriarch of Antioch (965–985)
• John VI of Naples, Duke from c. 1097 to c. 1120
• John VI the Affluent, Catholicos of the Holy See of Cilicia (1203–1221)
• John VI Kantakouzenos (1292–1383), Byzantine Emperor from 1347 to 1354
• John VI, Duke of Brittany (1389–1442)
• John VI, Duke of Mecklenburg (1439–1474)
• John VI, Count of Nassau-Dillenburg (1535–1606)
• John VI, Prince of Anhalt-Zerbst (1621–1667)
• John VI of Portugal (1767–1826), King of the United Kingdom of Portugal, Brazil and the Algarves (1816–1825), King of Portugal and of the Algarves (1825–1826)