What's in a Name?

I found a website called "World Names Profiler" and it'll tell you a bit about your last name. I did two of them.

Demers:
934.35 per one million people in New Hampshire
401.54 per one million people in Maine
401.05 per one million people in Vermont
362.77 per one million people in Rhode Island


Now, for Katie and Diane, who I know read this...

Cavalluzzo:
40.58 per one million people in Campania, Italy
18.94 per one million people in Ontario, Canada
14.46 per one million people in Basilicata, Italy
5.36 per one million people in New York
1.34 per one million people in Florida