In Greek mythology, Mormo was a goddess who bit bad children, said to have been a consort of the goddess Hecate. Greek mythology comprises the collected narratives of Greek gods, goddesses, heroes, and heroines, originally created and spread within an oral-poetic tradition. ... A goddess is a female deity in contrast with a male deity known as a god. A great many cultures have goddesses, sometimes alone, but more often as part of a larger pantheon that includes both of the conventional genders and in some cases even hermaphroditic (or gender neutral) deities. ... In later Greek mythology, Hecate (or Hekate; Greek Ἑκάτη Hekátē) was scarcely more than the goddess of witchcraft and sorcery. ...

The name was also used to signify a female vampire-like creature in stories told to Greek children by their nurses to keep them from misbehaving. This article contains information that has not been verified. ...

Mormo was later used as a base for the word Mormon. A prophet who abridged the Book of Mormon which was "translated" in 1829 by Joseph Smith Jr.