Antonio Sciarretta's Toponymy
Common remarks: the place-names have been put in the nominative case, an asterisk * means not attested, reconstructed form. The late place-names of probable Latin origin have not been included. The IE roots are in the form given by Pokorny's Indogermanische Wörterbuch. The links will be active when the single pages will be published, see the main page. For any comment, suggestion, email me.
Vice versa, the coastal area shows influences of harder interpretation. Likely, a Western Italic stratum and a Liguro-Sicanian stratum (maybe Opican the first, Auruncan or Ausonian the second) left some toponymy. But the majority of the place names is of dobious intepretation.
Of course, many are the names of Greek origin, since the area of Cumae, Neaples and the islands were inhabited by Greek settlers.