John I.
John I is the name of the following people:
- John I (Pope) († 526), Italian Pope
- John I of Salzburg (before 739–746 / 747), Bishop of Salzburg
- Johannes Tzimiskes (924? –976), Byzantine emperor
- John I (Kiev) (1008-1035), Metropolitan or Archbishop of Kiev
- Johannes I. (Kraichgau) († after 1104), Bishop of Speyer
- John I (Trebizond) († 1238), Emperor of Trebizond
- Johannes von Thuchem , as Johannes I Bishop of Brandenburg
- John I of Blankenfelde
- Johannes I. Pfefferhard
- John I (Litomysl)
- John I. Crescentius
- Johannes I. (Münsterschwarzach)
- Johannes I (Waldsassen) († 1273), abbot of the Waldsassen monastery
See also:
- Yohannes I (before 1640–1682), Emperor of Ethiopia
