(Θυμώνδας), a son of MENTOR the Rhodian, and nephew of MEMNON. In B. C. 333, he was sent down into Lycia by king Dareius to commission Pharnabazus to succeed Memnon in the command of the fleet. [PHARNABAZUS, No. 3.] The land-force, consisting apparently of Greek mercenaries, Thymondas was himself to receive from Pharnabazus, and to lead up to Syria to meet the king.

At the battle of Issus, in the same year, Thymondas with his mercenaries occupied the centre of the Persian army, and did good service. After the battle, together with Aristomedes, Amyntas, and Bianor, and a large body of troops, he made his way over the mountains to Tripolis in Phoenicia. Here they found the ships which had conveyed their men over from Lesbos, and, having launched as many as they needed and burnt the rest, they sailed for Cyprus, and thence crossed over to Egypt. Whether Thymondas took part there in the attempt of Amyntas to possess himself of the sovereignty, we have no means of deciding. (Arr. Anab. 2.2, 8-10, 13; Curt. 3.8, iv. l.) [AMYNTAS, No. 5.]