Really! Someone hit the trifecta. Not only do we have the less talented Don Swayze, but we also have the less talented Mike Norris, son of Chuck Norris, and the less talented Chad McQueen, son of Steve McQueen.
Hahaha, you're absolutely right, I hadn't even thought of that! Notice how they use only their surnames in the box art, as if to say, 'look, we've got Patrick, Chuck and Steve here!'
Another is Michael Stone, brother of Sharon Stone. Years ago, there was an article on him in Hello or OK magazine, in which he talked about his life, and his upcoming role in an Arnie movie. He said that he'd spent two years in prison, where he 'mastered martial arts'. The article made it sound like he had a co-starring role in the movie, which turned out to be Eraser. In fact, Michael is a non-speaking member of the raid team that Arnie takes out in the darkened kitchen of his house.