According to the royal family's website, when male or unmarried female descendants of Queen Elizabeth need to use a surname (which is what Americans would more often refer to as a last name), Mountbatten-Windsor is available to them. It's unclear why the statement regarding Andrew listed the name without a hyphen.

Britain’s King Charles has announced that his brother, Andrew, will be stripped of his “prince” title and ordered to leave Royal Lodge, the 30-room mansion that has been his home since 2003, over the swirling Jeffrey Epstein scandal.

Mountbatten Windsor has been the official last name for direct descendants of the late Queen Elizabeth and Prince Philip since 196​​0, combining the last names affiliated with both of their families. Mountbatten stemmed from Prince Philip's lineage, while Windsor came from the Queen's side of the family.

Buckingham Palace has announced Prince Andrew will lose his royal titles and honours. But where does his surname Mountbatten Windsor come from?

Earlier this month, the royal agreed to stop using his “Duke of York” title, and now Buckingham Palace has indicated that we should call him Andrew Mountbatten Windsor.

The best-seller is back on the charts after news broke that the former prince has lost both his title and his royal digs

The extraordinary move caps his fall from grace over his ties to the convicted sexual predator Jeffrey Epstein.

Rep. Ro Khanna (D-Calif.) on Thursday warned that the now-former Prince Andrew, whom King Charles III stripped of his remaining royal titles, would face justice. Andrew, the king’s younger

Prince Andrew is preparing to leave his long-time residence, Royal Lodge in Windsor, after being stripped of his “prince” title, with plans underway for him to relocate to the Sandringham estate in Norfolk.

On Thursday, Buckingham Palace announced that Britain’s King Charles stripped his younger brother Andrew of all remaining titles and honours, ordering him out of his Windsor residence.