The king of Trachis. He was the friend of Heracles. His son Hippasus fell in battle fighting as the ally of Heracles. According to some, Ceyx was Heracles' nephew, for whom the hero built the town of Trachis.
- Pseudo-Apollodorus. The Library ii, 7.6 ff.
- Smith, William. (1870). Dictionary of Greek and Roman Biography and Mythology. London: Taylor, Walton, and Maberly.