Lewis & Short

Pēleus, ĕi and ĕos (gen. Peleos, Val. Fl. 1, 131; acc. Pelea, Hor. C. 3, 7, 17; voc. Peleu, Cat. 64, 26; Hor. A. P. 104; abl. Peleo, Cic. de Or. 3, 15, 57), m., = Πηλεύς, a king of Thessaly, son of Æacus, brother of Telamon, half-brother of Phocus, husband of Thetis, father of Achilles, and a sharer in the expedition of the Argonauts, Hyg. Fab. 14; Ov. M. 11, 221; 12, 365 sqq.; Cat. 64, 19; Hor. A. P. 96; Val. Fl. 1, 131.
Hence,

  1. A. Pēlēïus, a, um, adj., Peleian, poet. for Achillean: facta, Sil. 13, 803: virgo, of Achilles (Briseis), Stat. Achill. 2, 210.
  2. B. Pēlīdes, ae, m.
    1. 1. The son of Peleus, i. e. Achilles, Plaut. Bacch. 4, 9, 5; Ov. H. 8, 83: Pelidae currus, Verg. A. 12, 350; 2, 548; 5, 808; Hor. C. 1, 6, 6: lites Inter Peliden et inter Atriden, id. Ep. 1, 2, 12; Ov. M. 12, 605; Juv. 3, 280.
    2. 2. Also, the son of Achilles: Neoptolemus, Verg. A. 2, 263.