The name was that of a son of Poseidon who was a Theban champion in the war of the Seven Against Thebes, and also that of one of the twelve sons of Neleus, an Argonaut who had the power of changing his shape and who fought against Heracles. With regard to Poseidon's son, it is worth noting that one of the by-names of Poseidon himself was Clytos.
