Echidna was called the mother of all monsters, but really she was only the mother of about six of them: the dragon that guarded the Golden Apples of Hesperos, the Hydra, the Chimaera, Orthus (a hell-dog), and Cerberus, the Crommyonian Sow, the Caucasus Eagle (that's the one that kept eating Prometheus' liver every day), and by her son Orthus she mothered the Sphinx (see below) and the Nemean Lion. By Virginie Ropars
In Babylonian mythology, Tiamat is Chaos, a primordial Goddess of the Ocean, mating with Abzû (the god of fresh water) to produce younger gods. In the Enûma Elish, the Babylonian epic of creation, she gives birth to the first generation of deities; she later makes war upon them and is killed by the storm-god Marduk. The heavens and the earth are formed from Her divided body.