I am a Calais owner and I have no doubt that my car is part of the Commodore family. I don't think any of us are stupid enough to think otherwise. Holden don't brand it with Commodore badges and they refer to it as a Holden Calais rather than a Holden Commodore Calais. I'm not too sure why they do it that way. It is probably to make it appeal to the same people who don't know that Lexus is Toyota. Likewise, they won't know the Calais is a Commodore. Hard to imaging that there are people that stupid but there you go. You don't see HSV's with Commodore badges either.