Agathos Daimon, also called the good demon, was the god of fortune. More of a Greco-Roman god, he was locally worshipped in the area of Alexandria and depicted in the form of a snake. He most likely originated as an androgynous fertility spirit, but later became identified as the consort of Agathe Tyche (see Tyche). Librations were made regularly to this deity after meals and he was regarded as a friendly household guardian (see Lares). A.G.H.
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 6