Lewis & Short

Cercyo, ŏnis, m., = Κερκυών,

  1. I. a celebrated robber in Attica, conquered and slain by Theseus at Eleusis, Ov. M. 7, 439; Hyg. Fab. 187; Gell. 15, 21, 1.
    Acc. Gr. Cercyona, Stat. Th. 12, 577.
    Hence,
  2. II. Cercyŏnē-us, a, um, adj., pertaining to Cercyon: corpora, Ov. Ib. 410.