This reminds me of Home Improvement.
Tim (or maybe it was
Jill) realizes they don't know
Wilson's surname and asks, and he says "
Wilson". "Oh, so what's your given name" "It's
Wilson". ...
Wilson Wilson...
There is also a movie where the popular crowd thinks a guys name is
Brian and gets confused when his old friends call him
Ryan. So he tells them his name is
Brian Ryan.