Anonymous. When I was 30, I had a nanny job that was at least 10 hours a day, plus I would spend up to 3 hours a day commuting, sometimes more. It almost killed me and I was tired all the time and honestly, I was not a great nanny to this family because of it.
Therefore, Mountbatten-Windsor is the surname of all male (and unmarried female) descendants of Prince Philip and Queen Elizabeth II; this includes Prince Charles, Prince William and Prince Harry. Because Prince Harry and Price William use the title Prince, they do not use the last name Mountbatten-Windsor. They use the surname Wales because they are the sons of the Prince of Wales. Although Royals don't tend to use a last name, in the instance of a marriage, for example, Prince William's last name is Mountbatten-Windsor. This is the surname of all descendants of Prince Philip and Queen Elizabeth II (excluding females who marry).
Willam and Harry do have a last name; they are known as William Windsor and Henry Windsor. You might hear that they are also called William of Wales and Henry of Wales; that is another title, but their last names are now Windsor. Source(s): HRH Charles, Prince of Wales. Lady Shirley Â· 10 years ago.