Passage 7.22.8
Τριτείας δὲ οἰκιστὴν οἱ μὲν Κελβίδαν γενέσθαι λέγουσιν, ἀφικόμενον δὲ ἐκ Κύμης τῆς ἐν Ὀπικοῖς· οἱ δὲ ὡς Ἄρης συγγένοιτο Τριτείᾳ θυγατρὶ Τρίτωνος, ἱερᾶσθαι δὲ τῆς Ἀθηνᾶς τὴν παρθένον, Μελάνιππον δὲ παῖδα Ἄρεως καὶ Τριτείας οἰκίσαι τε ὡς ηὐξήθη τὴν πόλιν καὶ θέσθαι τὸ ὄνομα ἀπὸ τῆς μητρός.
Concerning the foundation of Triteia, some people say that it was founded by Celbidas, who arrived from Cumae in Opicia; but others say that Ares had intercourse with Triteia, daughter of Triton, who was a priestess of Athena, and that Melanippus, the son of Ares and Triteia, established the city after it had grown in population, and named it after his mother.