I've seen so many social media comments on posts saying "Kate Middleton isn't her name, show some respect." - it probably isn't her name as I guess she's not chosen to keep her maiden name. I'm sure nobody is being disrespectful. To be fair she's no more or less deserving of respect than you or me, is she?
But neither is the Princess of Wales her name. It's her job title. I read this about Andrew which seems to explain it.