when HRH Prince George of Cambridge becomes King George VII,
... or just possibly King George VIII ....
..... one has heard rumours that his grandfather (Charles) is not wildly impressed with Charleses 1 & 2, so was thinking of taking George (one of his names) as his title.
After all, Geo VI (aka Colin Firth!) was Albert Frederick Arthur George, and always known in the family as "Bertie". For that matter, his big brother Edward VIII/Duke of Windsor was Edward Albert Christian George Andrew Patrick David (all the patron saints - geddit?) and known as "David"