TIS, I've researched my family's origins also. I haven't been able to find the detail you found, but there's enough there. I too am surprised at the number of people with my last name across the country. My grandparents Americanized it, but I changed it back to its original Italian (my kids and wife didn't want to change).
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."