John IV of Trebizond (1404–1460)
Born 1404 CE, died 1460 CE.
John IV Megas Komnenos (Greek: Ιωάννης Μέγας Κομνηνός, Iōannēs Megas Komnēnos) (died April 1460) was Emperor of Trebizond from 1429 until his death. He was a son of Emperor Alexios IV of Trebizond and Theodora Kantakouzene.
Text from the Wikipedia article John_IV_of_Trebizond, licensed CC BY-SA 4.0.