1. A son of Pterelaus, a hero from whom Ithaca was believed to have derived its name. (Hom. Od. xvii. 207; Eustath. ad Hom. pp. 307, 1815; Hesych. s. v.)

2. Odysseus, king of Ithaca, is sometimes simply called Ithacus, or the Ithacan. (Ov. Ep. ex Pont. i. 3, 33; Virg. Aen. ii. 104.)