Overview: Across multiple mythologies, the term “mother of monsters” is used frequently on the likes of women such as Echidna, Lamia, and Angrboda. But in Mesopotamian mythology, the mother of monsters is Tiamat, who’s less of a woman, and more of an ocean, specifically, the source of all salt water. She also happens to be the mother of a lot of gods, which doesn’t do her any favors when the family reunion turns very violent.