John VIII of Constantinople

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Patriarch John VIII redirects here. There were also a Syriac Patriarch John VIII of Antioch (who ruled in 1049–1057) and a Patriarch John VIII of the Maronites.

John VIII Xiphilinos (Greek: Ιωάννης Η΄ Ξιφιλίνος), a native of Trebizond, was patriarch of Constantinople from 1064–1075. He was the uncle of John Xiphilinos the Epimator. John VIII also wrote a hagiography of Saint Eugenios of Trebizond.[1]


  1. William Miller, Trebizond: The last Greek Empire of the Byzantine Era: 1204-1461, 1926 (Chicago: Argonaut, 1969), p. 11
Eastern Orthodox Church titles
Preceded by
Constantine III Leichoudes
Patriarch of Constantinople
Succeeded by
Cosmas I