Career
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.
