Amarynceus was in Greek mythology a chief of the Eleans, and a son of Onesimachus or of Acetor. According to Hyginus, Amarynceus himself joined the expedition against Troy with nineteen ships. Homer, on the other hand, only mentions Amarynceus' son Diores (also known by the patronymic Amarynceides) as partaking in the Trojan War. The mother of Diores by Amarynceus was Mnesimache according to John Tzetzes.