Lewis & Short

Īsaeus, i, m., = Ἰσαῖος.

  1. I. A Grecian orator of Chalcis, instructor of Demosthenes, Quint. 12, 10, 22.
  2. II. A contemporary of the younger Pliny, also a Grecian orator, Plin. Ep. 2, 3 init.; Juv. 3, 74.