Lewis & Short

Ĕphĭāltes (Ĕphĭālta, ae, Sid. praef. Carm. 7, 25), ae, m., = Ἐφιάλτης.

  1. I. The son of Aloeus and brother of Otus, one of the stormers of heaven, killed by Apollo, Hyg. Fab. 28; Claud. B. Get. 75; Verg. Cul. 234.
  2. II. The betrayer of the Spartans at Thermopyiae, Front. Strat. 2, 2, 13.