Did you know that Archie and Lilibet Sussex became princes and princesses only after their grandfather, not their great-grandmother, became monarch?

Apparently, if their great-grandmother (the late Queen Elizabeth II) had not decided so, their cousins, the Welsh children, would have followed the same path.

According to the Mirror, George V introduced a rule in 1917 that only descendants of certain royal families could be given the titles of Prince and Princess at birth.

According to this logic, Prince George, Princess Charlotte, and Prince Louis would have been too low in the line of succession to receive the title of prince at birth, and only after Elizabeth's death.

Perhaps because George was destined to be the future monarch, the late queen changed the rules so that Prince George, now 9 years old, would be called Prince George from the beginning, and his younger siblings Princess Charlotte, now 8, and Prince Louis, now 5, would also be given the titles of princess and prince respectively.

As for 4-year-old Archie and 2-year-old Lili, it was widely reported that from the moment their grandfather King Charles ascended the throne, their parents were entitled to use the titles Prince and Princess if they wished, but until Lilibet's christening, spokesmen referred to the girl as "Princess Lilibet."

Shortly thereafter, the throne order on the official royal website was updated to reflect the children's new titles.

As of now, George is second in line to the throne, Charlotte is third, Louis is fourth, Archie is sixth, and Lilibet is seventh.