In one of
Leslie Dunkling's books he reports that there were a few 19th-century cases of
Smith being given as a fn to boys whose ln was ...
Smith. He could only imagine, he said, that the parents reasoned that a common ln like
Smith demanded an uncommon fn, like
Smith!
I'd be very surprised to meet a
Smith, and especially a
Smith Smith, but it's fashionable to use lns as fns, and occupation names are also trending, so it ticks two boxes right away. Let's hope it's a family ln!