Šumugan (Shumugan, Šumuqan, Šakkan, Šamkan, Amakandu) is, in Sumerian mythology a god of the river plains. In creation myth he is given charge by the god Enki over the flat alluvial lands of southern Mesopotamia. He is also known as a god of cattle who dwells in the court of the underworld goddess Ereshkigal. Šumugan's father is Shamash, the sun god, and he may derive from the similar god Lahar.
References
Sumugan Wikipedia(Text) CC BY-SA