A Kind of Who's on First.

On a walk with S (4 yrs old) and our neighbor whose first name is Guy stopped to talk to us. After he left, this conversation ensued:
S: "Who was that?"
Me: "You know who that was, that's our neighbor Guy."
S: "No, what's his name?"
Me: "Guy."
S: "No, what is the man's name?"
Me: "I told you, his name is 'Guy'"

Our version of Who's On First.