Abdi-Ashirta in Wikipedia
Abdi-Ashirta (c. 1300s BC) was the ruler of Amurru, a new kingdom in southern Syria subject to nominal Egyptian control, that was in conflict with King Rib-Hadda of Byblos.
Rib-Hadda complained bitterly to Akhenaten-in the Amarna letters-of Abdi-Ashirta's attempts to carve out a larger kingdom for himself at the former's expense. Abdi-Ashirta's death is mentioned in EA 101 by Rib-Hadda in a letter to Akhenaten. Unfortunately for Rib-Hadda, Abdi-Ashirta was succeeded by his equally capable son-Aziru-who would later capture, exile and likely kill Rib-Hadda in the process. Aziru later defected to the Hittite side which caused Egypt to lose control over her northern border province of Amurru which Aziru controlled.