Just trying to keep my sources straight and working through Lomas’ footnotes.
Cumis erant oriundi; Cumani Chalcide Euboica originem trahunt. Classe, qua advecti ab domo fuerant, multum in ora maris eius quod accolunt potuere, primo [in] insulas Aenariam et Pithecusas egressi, deinde in continentem ausi sedes transferre.
They originated in Cumae, and the Cumani came originally from Chalcis in Euboea. My means of the fleet, in which they had travelled from home, the possess great power over the shore of the sea where they reside, first they took the islands of Aenaria and Pithacusa, then they ventured to transfer their base to the mainland.
Μετὰ δὲ Δικαιάρχειάν ἐστι Νεάπολις Κυμαίων ὕστερον δὲ καὶ Χαλκιδεῖς ἐπῴκησαν καὶ Πιθηκουσσαίων τινὲς καὶ Ἀθηναίων, ὥστε καὶ Νεάπολις ἐκλήθη διὰ τοῦτο
After Dicaearchia is Neapolis of the Cumani, later colonized by the Chalcideans and some Pithacussans and Athenians, thus because of this it is called Neapolis.
Strabo 14.2.10 on the Rhodians: “among the Opici they founded Parthenopê”… notice a whole bunch of other rather outrageous claims and then a mention of Timaeus (not as the source of this particularly, but of their involvement in island foundations, that Strabo dismisses. Everyone loves to dismiss Timaeus!)
ἄστρον τι κοινὸν τῆς ὅλης οἰκουμένης cf. Erskine 1994
On Odysseus in Latium see my article on Fides…
Cf. Strabo 6.1.6 Chalcidians as founders of Rhegium as a sort of sacred spring exercise.
Velleius Paterculus 1.4.1-2: The Athenians established colonies at Chalcis and Eretria in Euboea, and the Lacedaemonians the colony of Magnesia in Asia. Not long afterwards, the Chalcidians, who, as I have already said, were of Attic origin, founded Cumae in Italy under the leadership of Hippocles and Megasthenes. According to some accounts the voyage of this fleet was guided by the flight of a dove which flew before it; according to others by the sound at night of a bronze instrument like that which is beaten at the rites of Ceres. At a considerably later period, a portion of the citizens of Cumae founded Naples. The remarkable and unbroken loyalty to the Romans of both these cities makes them well worthy of their repute and of their charming situation. The Neapolitans, however, continued the careful observance of their ancestral customs; the Cumaeans, on the other hand, were changed in character by the proximity of their Oscan neighbours. The extent of their walls at the present day serves to reveal the greatness of these cities in the past.
Athenienses in Euboea Chalcida <et> Eretriam colonis occupauere, Lacedaemonii in Asia Magnesiam. Nec multo post Chalcidenses orti, ut praediximus, Atticis, Hippocle et Megasthene ducibus, Cumas in Italia condiderunt. Huius classis cursum esse directum alii columbae antecedentis uolatu ferunt, alii nocturno aeris sono, qualis Cerealibus sacris cieri solet. Pars horum ciuium, magno post interuallo, Neapolim condidit. Vtriusque urbis eximia semper in Romanos fides facit eas nobilitate atque amoenitate sua dignissimas. Sed illis diligentior ritus patrii mansit custodia, Cumanos Osca mutauit uicinia. Vires autem ueteres earum urbium hodieque magnitudo ostentat moenium.
On this last and the connection to Pseudo-Symnos above, see Malkin.