DU–Teššup was the son of Aziru, of the 1350-1335 BC Amarna letters correspondence, and also the father of Aziru's successor, in Amurru-(regional Syria).
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Aziru, and his father Abdi-Ashirta, were some of the major instigating forces-(in the north) causing conflict with the Egyptian pharaoh, as cities–('city-states'), and regions were under constant threat and destruction in the northern, and western Canaan region-(Lebanon, and southern Syria).