Achaeus
According to nearly all traditions a son of Xuthus and Creusa, and consequently a brother of Ion and grandson of Hellen. The Achaeans regarded him as the author of their race, and derived from him their own name as well as that of Achaia, which was formerly called Aegialus. When his uncle Aeolus in Thessaly, whence he himself had come to Peloponnesus, died, he went thither and made himself master of Phthiotis, which now also received from him the name of Achaia. (Apollodorus I Description of Greece by Pausanias vii.) Servius (ad Aen. i. 242) alone calls Achaeus a son of Jupiter and Pithia, which is probably miswritten for Phthia.
From Smith's Dictionary of Greek and Roman Biography and MythologyFrom A Smaller History of Greece
The PELASGIANS are universally represented as the most ancient inhabitants of Greece. They were spread over the Italian as well as the Grecian peninsula; and the Pelasgic language thus formed the basis of the Latin as well as of the Greek. They were divided into several tribes, of which the Hellenes were probably one: at any rate, this people, who originally dwelt in the south of Thessaly, gradually spread over the rest of Greece. The Pelasgians disappeared before them, or were incorporated with them, and their dialect became the language of Greece. The Hellenes considered themselves the descendants of one common ancestor, Hellen, the son of Deucalion and Pyrrha. To Hellen were ascribed three sons, Dorus, Xuthus, and AEolus. Of these Dorus and AEolus gave their names to the DORIANS and AEOLIANS; and Xuthus; through his two sons Ion and Achaeus, became the forefather of the IONIANS and ACHAEANS. Thus the Greeks accounted for the origin of the four great divisions of their race. The descent of the Hellenes from a common ancestor, Hellen, was a fundamental article in the popular faith. It was a general practice in antiquity to invent fictitious persons for the purpose of explaining names of which the origin was buried in obscurity. It was in this way that Hellen and his sons came into being; but though they never had any real existence, the tales about them may be regarded as the traditional history of the races to whom they gave their names.
From The History of Rome by Theodor Mommsen
In the kingdom of Asia the diadem of the Seleucidae had been worn since 531 by king Antiochus the Third, the great-great-grandson of the founder of the dynasty. He had, like Philip, begun to reign at nineteen years of age, and had displayed sufficient energy and enterprise, especially in his first campaigns in the east, to warrant his being without too ludicrous impropriety addressed in courtly style as "the Great." He had succeeded--more, however, through the negligence of his opponents and of the Egyptian Philopator in particular, than through any ability of his own--in restoring in some degree the integrity of the monarchy, and in reuniting with his crown first the eastern satrapies of Media and Parthyene, and then the separate state which Achaeus had founded on this side of the Taurus in Asia Minor.
