Pausanias traces the Aeacid pedigree on the word of the epic poet Asius: to Phocus were born Panopeus and Crisus. The sons of Phocus made their home about Parnassus, in the land now called Phocis, while the rest of the line of Aeacus departed from the beginning to other lands — Peleus and Telamon driven into exile for the murder of Phocus.2Pausanias — Description of Greece 2.29.2, 2.29.4

Through the two brothers the Aeacid blood reached the great deeds of the Trojan cycle. From Panopeus came Epeus, who made, according to Homer, the wooden horse; and Crisus fathered Strophius, whose son was Pylades, the friend of Orestes. So the one brother begot the maker of the engine that took Troy, the other the grandfather of Orestes' companion.3Pausanias — Description of Greece 2.29.4

The wife of Crisus' son Strophius is told two ways. Pausanias, following Asius, makes her Anaxibia, the sister of Agamemnon, and from that marriage comes Pylades. Hyginus instead calls the wife of Strophius the Phocian Astyoche, Agamemnon's sister, to whom Electra sent the infant Orestes to be reared in Phocis.4Pausanias · Hyginus — Description of Greece 2.29.4; Fabulae 117