Watt and Knott

"Who's calling?" was the answer to the telephone.

"Watt."
"What is your name, please?"
"Watt's my name."

"That's what I asked you. What's your name?"

"That's what I told you. Watt's my name."

A long pause, and then from Watt, "Is this James Brown?"

"No, this is Knott."

"Please tell me your name."

"Will Knott."

Whereupon they both hung up.