John IV may refer to:
- Patriarch John IV of Constantinople, Patriarch from 582 to his death in 595
- Pope John IV, Pope from 640 to his death in 642
- John IV, Bishop of Naples (died 835)
- John IV of Naples, Duke from 997 to after 1002
- John IV of Gaeta (died 1012)
- John IV Laskaris (1250–c. 1305), Emperor of Nicaea from 1259 to 1261
- John IV, Duke of Brittany (1295–1345)
- John IV, Duke of Brabant (1403–1427)
- John IV, Duke of Mecklenburg (1370–1422)
- John IV of Trebizond (c. 1403–1459)
- John IV, Duke of Bavaria (1437–1463)
- Ivan IV of Russia (Ivan the Terrible, 1530–1584)
- John IV of Portugal (1603–1656), known as John II, Duke of Braganza, before 1640
- John IV of Ethiopia (c. 1831–1889)
Famous quotes containing the word john:
“Spig Wead: Ive been thinking what a heel Ive been about you and about my own kids. I dont know, when I do something, I go all the way. Living. Gambling. Flying. I tap myself out. I guess thats the way I want it to be. Maybe even the way I am.
Minne Wead: Star-spangled Spig. Damn the martinis, full speed ahead and dont give up the ship.”
—Frank Fenton, William Wister Haines, co-scenarist, and John Ford. Spig Wead (John Wayne)
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