In Mesopotamian religion, the god of the sun and of justice. Utu was his name in Sumerian religion, later this changed into Shamash.
In Sumerian religion, Utu was son of the moon god, Nanna, and the goddess Ningal, brother of Ishkur, Inanna and Erishkigal.
Utu is represented as wearing a helmet and a weapon resembling a saw. The saw is believed to have symbolized the cutting up of the night to allow dawn to emerge.
Akkadian, Babylonian and Assyrian religion
In Akkadian religion, Utu changed name over time to Shamash, a name he kept into Babylonian and Assyrian religion.
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