Pausanias Description of Greece 3.2.1

[1]
  Eurysthenes, the elder of the sons of Aristodemus, had, they say, a son Agis, after. whom the family of Eurysthenes is called the Agiadae. In his time, when Patreus the son of Preugenes was founding in Achaea a city which even at the present day is called Patrae from this Patreus, the Lacedaemonians took part in the settlement. They also joined in an expedition oversea to found a colony. Gras the son of Echelas the son of Penthilus the son of Orestes was the leader, who was destined to occupy the land between Ionia and Mysia , called at the present day Aeolis ; his ancestor Penthilus had even before this seized the island of Lesbos that lies over against this part of the mainland.

[1] Eurysthenes, the elder of the sons of Aristodemos, had, they say, a son Agis, after. whom the lineage of Eurysthenes is called the Agiadai. In his time, when Patreus the son of Preugenes was founding in Achaea a city which even at the present day is called Patrai from this Patreus, the Lacedaemonians took part in the settlement. They also joined in an expedition oversea to establish a colony. Gras the son of Ekhelas the son of Penthilos the son of Orestes was the leader, who was destined to occupy the land between Ionia and Mysia, called at the present day Aeolis; his ancestor Penthilos had even before this seized the island of Lesbos, which faces this part of the mainland.