What I mean is, is it possible to tell where my Italian ancestors might’ve originated from?

My mom’s family came initially from Angri in Campania, but one thing I’ve noted is that for Italians who were from the turn of the 20th Century, they were tall. My great grandpa was 6 feet, his sons were 5’10, 5’11” 1/2” and over 6 feet in height. They were also rather fair.

Is there any way of figuring out their descent? Meaning who they initially came from?