Polybus begins a longish run of 'Poly' names, in which this first element means 'many' {polys). There were two kings of note named Polybus. One was the king of Corinth who was married to Merope and who adopted Oedipus.

The other reigned over Sicyon and was a son of Hermes and Chthonophyle. The name is a 'power' or royal one, meaning 'many oxen', the second element being bous, 'ox'.