I am not sure where the Queen of England gets her list of potential titles to bestow, other than I am sure there is someone buried in the Royal household who tracks and thrives on these items, but I do know she tried to give her own son Prince Edward the title of Duke of Cambridge years ago.
Proving that there is some real behind the scenes negotiating going on, he became the Earl of Wessex instead, even though he actually is the only one who actually went to Cambridge. On the death of his father, he will, however, take over the title of Duke of Edinburgh.
So the Queen has name restrictions to deal with, just like the rest of us. She even went to Cambridge three days before the wedding and the name announcement. Maybe secretly breaking the news and preparing them for the subsequent publicity. Or, alternatively, asking them to accept the hullabaloo that comes with the name, especially for a future King – who appears to not previously have had any known attachment to the area. And Catherine’s family live the other side of London, much closer to Oxford in fact!
The British Royal Family are the ultimate zenith in personal people branding – and major ambassadors for the British Tourist Trade. If you are American, don’t criticize them. After all, we have a Disney parade on each coast with lots of pomp and ceremony and costumes every evening to help suck the tourists in too.