History of the Peloponnesian War

nor indeed was it, as I think, called all by that one name of Hellas; nor before the time of Hellen, the son of Deucalion, was there any such name at all. But Pelasgicum (which was the farthest extended) and the other parts, by regions, received their names from their own inhabitants. But Hellen and his sons being strong in Phthiotis and called in for their aid into other cities, these cities, because of their conversing with them, began more particularly to be called Hellenes; and yet could not that name of a long time after prevail upon them all. This is conjectured principally out of Homer.