Phthius (founder of Phthiotis)

In Greek mythology, Phthius () was the eponymous ruler of Phthiotis in southern Thessaly.Dionysius of Halicarnassus, Antiquitates Romanae 1.17.3

Family Phthius was the son of Poseidon and Larisa, daughter of Pelasgus. He was the brother of Achaeus and the younger Pelasgus.

Phthius became the father of Amphictyone who bore to Asterius a son, Dotius (Dotis). The latter being one of the possible eponyms of Dotium (Dotion) in Thessaly.Stephanus of Byzantium, s.v. Dōtion (Δώτιον) with Pherecydes as the authority (fr. 172)

Mythology Phthius together with his brothers, left Achaean Argos with a Pelasgian contingent for Thessaly. They then established a colony on the said country naming it after themselves. The only single source of the accounts of Phthius is recounted by Dionysius of Halicarnassus in his Roman Antiquities about the Pelasgian race's migration.

Notes

References Dionysius of Halicarnassus, Roman Antiquities. English translation by Earnest Cary in the Loeb Classical Library, 7 volumes. Harvard University Press, 1937–1950. Online version at Bill Thayer's Web Site Dionysius of Halicarnassus, Antiquitatum Romanarum quae supersunt, Vol I-IV. . Karl Jacoby. In Aedibus B.G. Teubneri. Leipzig. 1885. Greek text available at the Perseus Digital Library.