(Ἀμφιτρυωνιάδης), or AMPHITRYO'NIDES, a patronymic from Amphitryon, by which Heracles is sometimes designated, because his mother was married to Amphitryon. (Ov. Met. 9.140, 15.49; Pind. O. 3.26, Isth. 6.56.)
[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