2. An Athenian, who was sent in B. C. 348 as ambassador to king Philip of Macedonia, with the view of recovering the ransom which Phrynon of Rhamnus had been obliged to pay during the truce of the Olympian games to pirates who were in the pay of Philip. On his return from Macedonia, Ctesiphon confirmed the report which had been brought to Athens by Euboean ambassadors, that Philip was inclined to make peace with the Athenians. After this, Ctesiphon was one of the ten ambassadors who treated with Philip about peace. (Dem. de Fals. Leg. pp. 344, 371; Argum. ad Dem. de Fals. Leg. p. 336; Aeschin. de Fals. Leg. cc. 4, 12, 14; Harpocrat. s. v. Κτησιφῶν.)