Lewis & Short

Oeā̆grus, i, m., = Οἴαγρος,

  1. I. a king of Thrace, the father of Orpheus, Ov Ib. 484; Hyg. Fab. 14.
    Hence,
  2. II. Oeā̆grĭus, a, um, adj., = Οἰάγριος, Œagrian, poet. for Thracian: Oeagrius Hebrus, Verg. G. 4, 524: Haemus, where Orpheus was torn in pieces, Ov. M. 2, 219: dulcius Oeagrios pulsabat pectine nervos, played on the cithara like Orpheus, Sil. 4, 463.