Fairly common here in Appalachia too
If I’d stayed on the family homestead, I’d have had to travel 50 miles to find someone who wasn’t a cousin to some degree.
That’s what comes from families spending 10 generations in the same place, and having 10+ kids per generation.
My grandmother had 60 first cousins. My mother had hundreds of second cousins. I don’t even want to think about how many third cousins I have. (I dated one, in high school, despite living 1000 miles away. We didn’t realize it until we both went back to visit the family for Thanksgiving.)