CEYS, SEYS. Ceyx was king of Trachis and a son of Lucifer, the morning star. On his way to consult Apollo's oracle at Delphi he encountered a series of disasters, among them the loss of his brother Onetor. On his way back from Delphi his ship ran into a storm, and he was drowned. His wife Alcyone mourned and grieved so continually that Juno, goddess of married women, took pity on her and sent her a vision of the dead Ceyx (Met XI.346-748; OM XI.2996-3787).
The Man of Law says that Chaucer has told the story of Ceys and Alcione, MLI 57. A full version appears in BD 44-269. Machaut tells the story in La Fonteinne amoureuse, 539-1034. It appears in Gower, Confessio Amantis IV.2928-3123. [Alcione]
Ceys, the French variant, appears once, medially, MLI 57; Seys, a spelling variant, appears six times in medial positions, BD 63, 75, 142, 220, 229, 1327.