John II Megas Komnenos (Greek: Ιωάννης Β΄ Μέγας Κομνηνός Iōannēs II Megas Komnēnos) (c. 1262 – August 16 1297) was Emperor of Trebizond from 1280 to 1297. He was the youngest son of Emperor Manuel I and his third wife Irene Syrikaina a Trapezuntine noblewoman. John succeeded to the throne after his full-brother George was betrayed by his archons on the mountain of Taurezion.
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