Note 3531 — BOOK V. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST OR FORMERLY EXISTED.
John Bostock translation
Said by Tzetzes to have been derived from the Greek τρίτος, “the third,” because it had three times changed its name: having been called, first, the Ocean; secondly, Aëtus, or the Eagle; and thirdly, Ægyptus.