There are 209 families with the Finzi name in Italy. This is what I discovered after using the mapping tool on the ITALIANNAMES.COM website. The tool is one of the best of this type that I've found on the Web. It's easy to use and can zoom into to particular regions. After typing in your family name and doing the initial search, click the "see how they are distributed in Italy" button. You will get a map of Italy numbering how many families have your name in each region. Click on a particular region and it will zoom in to show the towns they are living in.
If you want to find out more specifics, you could look up your family name in the Italian White Pages along with the name of a town and get both addresses and phone numbers.
In case you want to know what your family names mean, here is a site which lists the Origins and Etymology of Italian Surnames... both the meaning and where the name originated.
Good luck in your family research!
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