Let's face it. If you're a prince or princess, you probably don't need a last name. But when he or she gets here, there are three likely last names that William and Kate will chose from: Wales, Cambridge or Mountbatten-Windsor.
Wales is the surname both Prince William and Prince Harry use.
When William and Kate got married, they inherited the house of Cambridge.
Mountbatten-Windsor was the family surname adopeted in 1960.
Choices! I vote for Wales. We'll see when the newest royal arrives! Read more HERE.