A man was taking his wife, who was pregnant with twins, to the hospital when - in his excitement - his car went out of control and crashed into an oak tree.
Upon regaining consciousness, he saw his brother, a relentless world-class practical joker, sitting at his bed side with the warm grin he'd know since childhood.
He asked his brother how his wife was, and his brother replied:
"Don't worry, everybody is fine and you have a son and a daughter. But the hospital was in a real hurry to get the birth certificates filed and since both you and your wife were unconscious, I named them for you."
The husband was thinking to himself: "Oh no, what has he done now?" And he said with trepidation: "Well what did you name them?"
The brother replied: "I named the little girl Denise."
The husband, relieved, said: "That's a very pretty name! What did you come up with for my son?"
"Denephew," the brother replied.