Who is Anu from Myths from Mesopotamia: Creation, the Flood, Gilgamesh, and Others and what is their importance?

Anu is the god of Uruk, and the father of the older generation of gods. He plays a vital role in several Mesopotamian myths. He is the father of Ellil, Adad, Gerra, Shara, and in some areas, Ishtar. Anu is the son of Anshar and Kishar.