I like Edmund, suggested earlier in the thread.
I like Albert, but because of the Prince Albert I hope they don't go for that!
I like Arthur, too, a lovely name. My granddad was called Arthur, I'm glad lots of mums today are revisiting the name.
They've used Louis and Alexander already - I was so disappointed when George wasn't an Alexander, I think it would have been a good name to use.
I don't think they'll use the name of any royal alive as that would be too confusing, and a bit unfair on someone like Edward's son if they called him James.
They might go with Michael as a middle name after Kate's father. And I think Philip might also go as a middle name after Prince Philip.
There's already a Freddie Windsor, so think that will be out.
Ernest and Alfred are other possibilities.