(Γυγαίη), daughter of Amyntas [. and sister of Alexander I. of Macedonia, was given by her brother in marriage to BUBARES, in order to hush up the inquiry which the latter had been sent by Dareius Hystaspis to institute into the fate of the Persian envoys, whom Alexander had caused to be murdered. Herodotus mentions a son of Bubares and Gygaea, called Amyntas after his grandfather. (Hdt. 5.21, 8.136; Just. 7.3.)
[E.E]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