5. A son of Sthenelus, king of the Ligurians, and a friend and relation of Phaeton. He was the father of Cinyras and Cupauo. While he was lamenting the fate of Phaeton on the banks of the Eridanus, he was metamorphosed by Apollo into a swan, and placed among the stars. (Ov. Meet. 2.366, &c.; Paus. 1.30.3; Serv. ad Aen. 10.189.) A sixth personage of the name of Cycnus is mentioned by Hyginus. (Fab. 97.)