(Γογγύλος).

1. Of Eretria, was the agent by whose means Pausanias entered into communication with Xerxes, B. C. 477. To his charge Pausanias entrusted Byzantium after its recapture, and the Persian prisoners who were there taken, and who, by his agency, were now allowed to escape, and (apparently in their company) he also himself went to Xerxes, taking with him the remarkable letter from Pausanias, in which he proposed to put the Persian king in possession of Sparta and all Greece, in return for marriage with his daughter. (Thuc. 1.129; Diod. 11.44; Nepos. Paus. 2.)

Xenophon, on his arrival in Mysia with the Cyrean soldiers (B. C. 399), found Hellas, the widow of this Gongylus, living at Pergamus. She entertained him, and, by her direction, he attacked the castle of Asidates, a neighboring Persian noble. She had borne her husband two sons, Gorgion, and another Gongylus, the latter of whom, on finding Xenophon endangered in his attempt, went out, against his mother's will, to the rescue, accompanied by Procles, the descendant of Demaratus. (Xen. Anab. 7.8. §§ 8, 17.) These two sons, it further appears (Xen. Hell. 3.1.6), were in possession of Gambrium and Palaegambrium, Myrina and Grynium, towns given by the king to their father in reward for his treachery. On Thibron's arrival with the Lacedaemonian forces, and the incorporation, shortly after the above occurrence, of the Cyrean troops with them, they, with Eurysthenes and Procles, placed their towns in his hands, and joined the Greek cause.