ISUS(Ἴσος), a spot in Boeotia, near Anthedon, with vestiges of a city, which some commentators identified with the Homeric Nisa. (Strab. 9. p. 405; Hoem. II. 2.508.) There was apparently also a town Isus in Megaris ; but the passage in Strabo in which the name occurs is corrupt. (Strab. L. C.）