Ereshkigal was the goddess of the underworld in Mesopotamian mythology. She was regarded as the queen of the Great Earth, and she was one of the many deities that ruled the underworld in the region. Her main temple was in Kutha, which was once a part of Nergal's empire but her cult had a limited scope. The two main myths about her are the tale of Inanna falling into the underworld and her marriage to Nergal. Other myths also refer to her as a son of various gods, such as Ninazu and Ningishzida.

The story of Ishtar's descent dates back to ancient Mesopotamia and is written in cunniform, the ancient script of the Summerians. It is believed that it symbolized the seasons and the development of rituals and doctrines related to the afterlife. This is also intended to illustrate the various rituals and doctrines that were commonly practiced in the temple-schools of the region.

Ereshkigal and her various demonic creatures were believed to have been the inspiration for some of the Greek myths, such as the stories of the Persephone and Hades. The Sheol concept in Judasiam was also closely related to the mythology of the underworld in Mesopotamia. However, since the monotheistic tradition prevented the goddess from being able to rule the underworld, Sheol was not able to include her.

Read more about her at https://mythlok.com/ereshkigal/