(Ἠμαθίων), a son of Tithonus and Eos, and a brother of Memnon. (Hes. Th. 985.) He was king of Arabia, and was slain by Heracles. (Apollod. 2.5. 11; Q. Smyrn. 3.300.) There are two other mythical personages of this name. (Ov Met. 5.105; Verg. A. 9.571.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890