Mountbatten-Windsor is the personal surname of some of the descendants of Queen Elizabeth II and Prince Philip, Duke of Edinburgh under a Declaration made in Council in 1960. However, although the declaration specifically applies the name "Mountbatten-Windsor" to male-line descendants of the Queen not holding Royal styles and titles, "Mountbatten-Windsor" has been used by some descendants of the Queen who do hold Royal styles. At the time, palace officials claimed in private communications that it created a hidden surname that would emerge several generations later when some of Elizabeth II descendants were further removed from the throne.
The British monarchy now asserts that the name Mountbatten-Windsor is used for members of the Royal Family who do not have a surname, when a surname would otherwise be required. For example, Prince Andrew, Duke of York and Princess Anne, Princess Royal, children of the Queen, used the surname "Mountbatten-Windsor" in official marriage registry entries. Likewise, the Duke of Cambridge used the name when filing a French lawsuit related to the topless pictures of his wife published by the French magazine Closer.
Relation to House of Windsor
Mountbatten-Windsor differs from the official name of the British royal family or Royal House, which remains Windsor. The adoption of the Mountbatten-Windsor surname applies only to members of the British royal family who are descended from the Queen, and not, for example, to her cousins, or descendants of her sister, Princess Margaret.
- "The Royal Family name". The British Monarchy. Retrieved 2011-05-05.
- http://www.heraldica.org/topics/britain/TNA/HO_290_72.htm (see, in particular, the article by Edward F. Iwi).