Adad-guppi /ˈædəˌɡɒpi/ (Babylonian cuneiform: Adad-gûppîʾ;[1] c. 648-544 BC), also known as Addagoppe, was a devotee of the moon god Sîn in the northern Assyrian city of Harran, and the mother of King Nabonidus (ruled 556–539 BC) of the Neo-Babylonian Empire.[2]