The Raverta Family Home

I am researching the follow families, Raverta, Biscaldi, Thorne,and Giuffrida. The Raverta family came from Northern Italy notably the town of Gambolo which is about 25 miles south west of Milano. The Biscaldi also from nothern Italy, a town of Pieve del Cario. The Thorne family, at this point in time I don't know whether they came from Ireland or England. But the most recent link was from Maine. The Giuffrida family from southern Italy. I am willing to share any information I have.