That's only half the rumour; he's also frequently claimed to be Kevin from 'Mr.Belvedere'.
A similiar rumour surrounded Alice Cooper, who, it was said, was really the guy who played Eddie Haskell on 'Leave it to Beaver' .
No, Alice was supposed to have been Wally.
Another great rock myth: that Elvis is dead. We all know he's living on a tropical island, taking care of a vegetative JFK until the time is right for his comeback. There's also the myth, started by the movie "American Hot Wax," that Chuck Berry would ever play a show for free. And the myth that Van Halen was better with Sammy Hagar. And the myth that Yes is worth listening to.
Have I offended everyone yet? Good!
Boy that Eddie Haskell, he was a busy guy - being both Alice Cooper AND Johnny "Wad" Holmes.
Didn't Marylin manson play Satan in The Passion of the Christ?