In Sumerian myth, Anzu was a large bird (eagle or vulture) who lived in the realm of the gods.
The ancient civilization of Sumer, located in Mesopotamia (present-day Iraq), rose to power during the Ubaid and Uruk periods and was known for its advances in writing. Around 1700 BC, Sumerian culture fell under Babylonian rule and was absorbed into the Akkadian population. Read articles about Sumerian culture below.
Ereshkigal, the ruler of the underworld, is the sister of Ishtar/Inanna.
Ishtar/Inanna is the sister of Ereshkigal, who rules the dead.