What is the actor's middle name that voices the character Dr. William MacDougal?
Groundskeeper Willie: Dr. William MacDougal, usually known as Groundskeeper Willie, is a recurring character on "The Simpsons", voiced by Dan Castellaneta. Dan Castellaneta: Daniel Louis Castellaneta ( ; born October 29, 1957) is an American actor, voice actor, comedian and screenwriter.
Louis