Sashamalia
Usually two people in the royal family get the same place name title in a generation.
As people inherit it after someone dies.
And people get confused, amd think of the first person who had the place name, not the second person who now has it
It's confusing for people. And it's hard to remember, as their title keeps changing when someone dies.
Is it really that confusing and difficult?
I can't say I'm bothered whether "Kate Middleton" is used or "the Princess of Wales" or even just "Kate/Catherine".
I'd know who was meant. I'd certainly draw the line at something derogatory like "Waity Katie" though.
Non-royal people change their names and/or job titles too.
If a woman chooses to take her husband's surname instead of her maiden name, people don't stumble around, bewildered, saying "But Mrs Smith is his mother - now it's his wife too! How can that be?".
Diana was Princess of wales, now Kate is princess of wales
And there've been Princesses of Wales long before Diana, so if the poor, confused people are going to think of the first person who had the place name they're going to have to think back a good way.
I don't think people are as easily confused and unable to take in change as you think.
Whether or not they choose to use that knowledge and always say "Catherine, the Princess of Wales", shorten it to the (inaccurate) "Princess Catherine/Kate" or use "Kate Middleton" is another matter.