Check in our lists of Regions and Comuni
. It is possible what your parents or grandparents knew and told you is different now. Places that were municipalities in the past may now be included in another municipality, and some municipalities have changed province when new Provinces were established. Also a new region was formed (Molise), which was previously one with Abruzzo. We have a complete (we hope) List of "Comuni" for Italy, that you can browse by clicking on the label "Regions" in the top navigation bar.
If your ancestors came through Ellis Island, visit http://www.ellisisland.org/
and research only by surname. If you get a great many results, the website will tell you "Your search returns ##### records, please enter a first name or first initial to narrow down your search". At this point repeat the research with at least an initial (try with the most common: A, C, G, F, M, P, V). When you have the results, choose in the right column "Name of town - edit" and you will see a List of the places of origin in Italy. They will appear in alphabetical order, but some may have the correct spelling.