I love your idea its very cute. My top choices for a boy would be Henry James, Charles Henry, James Thomas.

I can see a potential problem with Girls names especially down the line if you have more daughters. You could have more girls names if you feminized some kings names. Here's a list that might help. Personally im not a fan of most of them but a couple could be good.

Georgie
Georgia
Georgette
Georganne
Charleen
Charlene
Charlette
Charley
Charlisa
Charlynn
Charlanie
Jami
Jamey
Jamesina
Jamia
Jamielee
Johnna
Jonnelle
Johnette
Stephanie
Stephanna
Edmunda
Harolda
Alfreda

For a girl i like Georgie Grace, Charlotte Caroline and Isabelle Jane.

Good luck.

If your set on a british monarch, go for Matilda, I love it. If not I have some names:
I'm not sure if these are royalty or consorts:
Adele
Blanche
Clemence
Maria
Marie (Although, you should avoid giving her cake )
Reinette
Isabella
Hope this helps!

Thanks for the suggestions so far. I really apperciate them all.

I hadnt considered using the female form of the kings names before, thanks for that idea, it'll really help if we have more girls down the line.

As for other names that arent royal we prefer more tradtional names. and we dont really care if the name is popular or not. We are just after the prefect name for the baby.

Im looking forward to more suggestions.

I like James, Charles, and Henry as first names for a boy.

James Henry
Charles Andrew (Charlie) and notice i put in a princes name...
Henry James

For the girls Charlotte, Isabelle or Georgie.

Charlotte Caroline (Charley)
Isabelle(A) Georgette
Georgetta Jane (Georgie)

Georgia Eleanor Keep us posting. Lots of love, Alina

We just found out today that we wont be having any problems coming up with a girls name. Its a boy! It'll be nice for Will to have a brother to play with.

Thanks for all the help with girls names though, we truely appereciated it.

Now its full steam ahead with boys names. Love to hear more.