- the Duke's grandmother's name: Queen Elizabeth
- the Duchess' middle name (Catherine Elizabeth nee Middleton)
- the Duchess' mother's middle name (Carole Elizabeth Middleton)
- the Duke's mother's name, of course.
- probably best as a second or third name for the new princess
#1. Her Royal Highness Princess Elizabeth Diana Charlotte of CambridgeApparently the betting pools are all abuzz.
#2. Her Royal Highness Princess Elizabeth Alexandra Victoria of Cambridge