Passage 10.1.1
γῆς δὲ τῆς Φωκίδος, ὅσον μὲν περὶ Τιθορέαν καὶ Δελφούς ἐστιν αὐτῆς, ἐκ παλαιοτάτου φανερὰ τὸ ὄνομα τοῦτο εἰληφυῖά ἐστιν ἀπὸ ἀνδρὸς Κορινθίου Φώκου τοῦ Ὀρνυτίωνος· ἔτεσι δʼ ὕστερον οὐ πολλοῖς ἐξενίκησε καὶ ἁπάσῃ γενέσθαι τῇ ἐφʼ ἡμῶν καλουμένῃ Φωκίδι, Αἰγινητῶν ναυσὶν ἐς τὴν χώραν διαβάντων ὁμοῦ Φώκῳ τῷ Αἰακοῦ.
As for the land of Phocis, the part surrounding Tithorea and Delphi clearly received this name from the earliest times from Phocus, son of Ornytion, a Corinthian. Not many years later, however, the name prevailed to include the entire region now called Phocis, after the ships of the Aeginetans crossed over into this land bringing with them Phocus, son of Aeacus.