Lewis & Short

Phĕrētĭădes, ae, m., = Φερητιάδης,

  1. I. son of Pheres, king of Pherœ, i. e. Admetus, Ov. A. A. 3, 19.
  2. II. Phĕrētĭădae (Phĕrēcyăd-), ārum, m., = Φερητιάδαι, the inhabitants of Naples, the Neapolitans; so named after Pheres, king of Pheræ: Pheretiadum muri, Sil. 12, 159.