Prince Harry, Prince William
Prince Harry and Prince William's children will have different surnames. Pictured: Princes Harry, William during the annual Remembrance Sunday memorial on November 11, 2018 in London, England. Getty Images/Chris Jackson

Prince William and Prince Harry’s children will have different surnames even though they are cousins.

Ainhoa Barcelona, a journalist for Hello! magazine, said that this is because Prince William and Prince Harry do not also share the same surname even though they are brothers.

Prince William and Kate Middleton’s three children, Prince George, Princess Charlotte, and Prince Louis have the last name Cambridge, taking after their parents’ royal titles as the Duke and Duchess of Cambridge.

Due to this, it can be assumed that Prince Harry and Meghan Markle’s children will use the surname Sussex, which is inspired by the Royals’ official title as the Duke and Duchess of Sussex.

When Prince William and Prince Harry were still children, they used the surname Wales, which is part of their parents’ official titles as the Prince and Princess of Wales. But after the royal siblings tied the knot with their respective wives, their surnames were changed.

According to the publication, when Prince George and Princess Charlotte entered school, they used the full names George Cambridge and Charlotte Cambridge. When the two youngsters and Prince Louis eventually tie the knot, they will all have different surnames as well.

Meanwhile, members of the royal family do not normally use their surnames when they are being referred to in public. But since they are descendants of Queen Elizabeth II, they may also opt to use the surname Mountbatten-Windsor.

In 1960, Her Majesty and Prince Philip agreed that their descendants will use the combined surnames of Mountbatten-Windsor to reflect both of their surnames. But prior to this, Good Housekeeping claimed that Prince Philip placed so much pressure on his wife to ensure that his surname will be reflected in their official documents.

Royal biographer Hugo Vickers revealed that after the Queen’s father died, the monarch was asked what name she would like to use and she said, Windsor. Eight years later, the couple reached a compromise, and their four children all used the surname Mountbatten-Windsor.