I've decided to call Cinderella's kingdom Bretagne, which is the French name for Brittany, a present-day district of France, and formerly its own kingdom. Oh, and it's just occurred to me that Cinderella technically isn't the Queen of Bretagne anymore - her daughter Elise is. She's the Queen Mother and is ruling as Regent, but her legal claim to the throne died with Kit. Bretagne politics probably aren't going to be relevant once we hit the "real world", but I thought I should clarify that.