Lewis & Short

2. Cȳ̆cnus (Cȳ̆g-), i, m.

    1. A. A king of the Ligurians, son of Sthenelus, related to Phæton, who was changed to a swan and placed among the stars, Ov. M. 2, 367; Verg. A. 10, 189; cf. Hyg. Fab. 154; id. Astr. 3, 7.
    2. B. A son of Neptune and Calyce; he was father of Tenes, and was changed into a swan, Ov. M. 12, 72 sq., cf. Hyg. Fab. 157.‡ † cydărum, i, n., = κύδαρος, a sort of ship, acc. to Gell. 10, 25, 5.