My grandmother was one of nine, and all of her sisters married men named "Bob." All of them also had sons named "Bob." The next generation had several Robbies and Robs. We used to joke that at family reunions, all you'd have to do was go into the room and call "Uncle Bob?" to get most of the men's attention. At one point, I could count over twenty varieties of "Robert" in three generations. One Uncle Bobby even married a woman named Bobbie.
I also attended a small school for a while where we had four different "Meyers" on faculty, a Mr., two Mrs., and a Miss. Two were related by marriage (a Mrs. and a Miss, I think), but just a lot of unrelated Meyers.