With Prince Harry and Meghan Markle having their second child, many royal fans have been left puzzled over the baby’s surname.

They revealed their pregnancy on Valentine’s Day, the same day Princess Diana revealed her pregnancy with Prince Harry 37 years ago.

“We can confirm that Archie is going to be a big brother. The Duke and Duchess of Sussex are overjoyed to be expecting their second child,” the couple’s spokesperson said at the time.

The royal family can be identified by both the name of the royal house and a surname, though they are not usually the same, according to the royal family’s website. Many of them don’t even have a surname.

King George V declared in 1917 that “all descendants in the male line of Queen Victoria, who are subjects of these realms, other than female descendants who marry or who have married, shall bear the name of Windsor”

The royals do use Mountbatten-Windsor, though they frequently use a variety of names. Because their father was the Prince of Wales, Prince William and Prince Harry served in the military under the surname Wales.

Unless the Queen grants it, the Duke and Duchess of Sussex’s daughter will not get a royal title upon birth.

In 1917, King George V issued the following Letters Patent:

“…the grandchildren of the sons of any such Sovereign in the direct male line (save only the eldest living son of the eldest son of the Prince of Wales) shall have and enjoy in all occasions the style and title enjoyed by the children of Dukes of these Our Realms.”

This explains why an HRH title is given to Prince George.

As a result, Archie’s sister is likely to bear the Mountbatten-Winsdor surname as well.

However, as the Queen did with Prince William and Kate Middleton’s second and third children, she might issue a fresh Letters Patent to amend this.

Prince Harry and Meghan’s children can also be referred to as Lord or Lady, as determined by the Queen and Prince Philip in 1960.

According to an expert, Prince Harry and Meghan Markle have caused ‘long-term damage’ to the Queen and the Royal Family following their Oprah interview bombshells.

The Duke and Duchess of Sussex, who said they had been mistreated by the family, were aware that the fallout from the exclusive interview would be “difficult.”