(Ἱέρων).
1. A pilot or navigator of Soli in Cilicia, was sent out by Alexander with a triaconter to explore the southern shores of the Erythraean sea, and circumnavigate Arabia. He advanced much further than any previous navigator had done, but at length returned, apparently discouraged by the unexpected extent of the Arabian coast, and reported on his return that Arabia was nearly as large as India. (Arr. Anab. 7.20.)