Because it was a pain being one of 4 with the same name in my class. DH was also one of 3. In fact, back then, most people were one of several with the same name.
We seem much more imaginative with names these days. There's such a huge choice, why choose one that everyone else has also chosen.
I don't hate the names, I just wonder why you'd want your child to go through life being called by their first name and surname/initial.