Lewis & Short

Ălastor, ŏris, m., = ἀλάστωρ (a tormentor).

  1. I. One of the companions of Sarpedon, king of Lycia, killed by Ulysses before Troy, Ov. M. 13, 257.
  2. II. Name of one of the four horses in the chariot of Pluto, Cland. R. Pros. 1, 284.