What's the name of the robot on Lost in Space?

The answer is: The Robot. Full name Robot Model B-9, but "the Robot" will work just fine.While not a very creative nickname, it is to the point, and when you're navigating the strange and dangerous edges of space, you'll want this guy to be by your side.A prop costume was operated by Bob May, and the voice was almost always dubbed by Dick Tufeld.Source