ada4dADAD. ADAD is the Old Akkadian and Assyro-Babylonian name of the ancient Middle Eastern storm god, called Adda (Addu) or Hadda (Haddu) in northwest Semitic areas and known laterA. Sutherland - - In Mesopotamian (Babylonian-Akkadian) beliefs, Adad was a god of atmospheric phenomena.He mastered and controlled rains