Sithon, in Grecian mythology, was represented as the son of Poseidon and Assa, or of Ares and Achiroe, and as married to the nymph Mendeis, by whom he had Pallene and Rhoeteia. He was king of the Hadomantes in Macedonia, or of Thrace. Pallene, being sought by many suitors, was by Sithon promised to the aspirant who should successfully wage a single combat with him, and eventually to either Dryas or Cleitus, as the duel might determine. By the connivance of Pallene, Dryas was overcome and killed; but her trick having been discovered by Sithon, he built a pyre on which to burn her with the body of Dryas. Aphrodite, however, extinguished the already blazing pile, and so caused Sithon to change his mind and give Pallene to Cleitus. See Smith, Dict. of Gr. and Rom. Mythol. s.v.