I have also noticed this and have been taking advantage of it in my own research. I’ve been following these patterns in families with the same surname using the same combinations of given names. I’ve also used it in examining unusual/unique given names and given name combinations to identify families from the same general region that may be related to one another in earlier generations. Interestingly, it has led me to the same cluster of towns, and to repeated marriages between the same group of families sharing unique given names.
Tamarac, Florida, USA