Mesopotamian god of storms. In Assyria and Babylonia, he was one of the most powerful gods in the pantheon, associated with both the life-giving and destructive properties of rain and flood. In some regions of Mesopotamia, such as Suhu, he was, in the 1st millennium, the most important god in the local pantheon. Adad is the Akkadian name of the god. He is called Addu in Amorite and Ishkur (Iškur) in Sumerian.