My DH has vetoed a lot of (beautiful) names, which I've suggested. To date he has suggested two names:
Jack
James
I don't like either of them enough to use, though they are fine. I quite like James, but I'm worried the royal baby might be a boy named James and don't really want the name to match the Royal baby. I am due well before DoC is, so can't change choice after they have their baby.
Fwiw my choice would be:
Gabriel Wilfred Surname
Rowan Wilfred Surname (which ends in -son, so not sure if Rowan goes all that well)?
Dh doesn't like them, but hasn't done a total 
face at me for the Gabriel suggestion. So maybe he'll come round to that. But I'm not sure.