Historians tell us that the first king of the Thesprotians and Molossians after the flood was Phaethon, one of those who came into Epeirus with Pelasgus; but some say that Deucalion and Pyrrha established the sanctuary at Dodona and dwelt there among the Molossians.
In after time, however, Neoptolemus the son of Achilles, bringing a people with him, got possession of the country for himself, and left a line of kings descending from him. These were called after him Pyrrhidae; for he had the surname of Pyrrhus in his boyhood, and of his legitimate children by Lanassa, the daughter of Cleodaeus the son of Hyllus, one was named by him Pyrrhus. Consequently Achilles also obtained divine honours in Epeirus, under the native name of Aspetus.
But the kings who followed in this line soon lapsed into barbarism and became quite obscure, both in their power and in their lives, and it was Tharrhypas, historians say, who first introduced Greek customs and letters and regulated his cities by humane laws, thereby acquiring for himself a name. Alcetas was a son of Tharrhypas, Arybas of Alcetas, and of Arybas and Troas, Aeacides.
He married Phthia, the daughter of Menon the Thessalian, a man who won high repute at the time of the Lamian war1
and acquired the highest authority among the confederates after Leosthenes. Phthia bore to Aeacides two daughters, Deïdameia and Troas, and a son, Pyrrhus.