Rib-Hadda (also rendered Rib-Addi, Rib-Addu, Rib-Adda) was king of Byblos during the mid fourteenth century BCE. He is the author of some sixty of the Amarna letters all to Akhenaten. His name is Akkadian in form and may invoke the Northwest Semitic god Hadad, though his letters invoke only Ba'alat Gubla, the "Lady of Byblos" (probably another name for Asherah). An aged and ailing Rib-Hadda continued to write to Pharaoh, telling him of violent upheavals in Phoenicia and Syria, including revolutions instigated by Abdi-Ashirta's son Aziru coupled with incursions by Apiru raiders. (e.g. EA 137)