If they came from the Campania area, this link might help you. It's a database of towns a nd within the towns, family surnames with the associated irths, marriages, deaths and children.
The information on my family went back to 1698.
Btw, if your Luigi is from Atripalda, we might have ancestors in common. Let me know.
http://www.imaginesmaiorum.net/Vince Castelli