They'll most likely name him something that's already been in the family; James, William, etc.
Such boring names... personally, I think they should name him something cool like Simba, Julius and Mohammed or something jazzy like Bwabwa or Rafhambourligeoiretzschemagqah.
Not entirely, but since it's British Royalty and I'm British, I care , and since most of the other people paying attention are American, they care, but for no bloody reason.