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). DU-Teššup's name refers to the Hurrian god of sky and storm, Teshub.
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).
DU–Teššup is the presumed author of tablet-letter EA 169-( EA is for 'el Amarna') written to pharaoh, requesting Aziru's return from "forced" consultation. DU–Teššup is not mentioned by name in the Amarna letters corpus.
Aziru was called to Egypt to explain his actions: bad, and good. Aziru wrote, as did his father Abdi-Ashirta, that he was protecting his regions. All the letters from both Aziru and Abdi Ashirta reflect: "the middle conflict", allegiance to pharaoh to the south (northeast Egypt), control and protection (calling 'to guard') the local cities (and their rulers), in northern Canaan, and personal aspirations of total control, and their personal aggrandizement. (This probably partially led to Abdi-Ashirta's death and removal from the scene, but since his son Aziru became the major player, Abdi-Ashirta's age can also be presumed.)
With introduction damaged, etc.:
Besides Pharaoh, Tutu, the Egyptian official is addressed. The local Suteans (mercenaries, etc.?) and the region of Nuhašše are also the subject of this letter.