The alterations made in the 1960s stipulated that "The King's descendants, excluding those with the style of Royal Highness and the title of Prince/Princess, or female descendants who marry, would bear the name of Mountbatten-Windsor." The Times discloses that Harry and Meghan actually transitioned to the surname Sussex after King Charles III's coronation in May 2023, although this update was not reflected on Archewell.com.
A source cited by The Times elaborates, "The rationale behind the new site is straightforward - it serves as a central hub for the Sussexes' endeavors, reflecting the family's adoption of a shared surname for the first time since the King's coronation. This marks a significant moment for the family, symbolizing their unity and instilling a sense of pride."
At birth, Archie and Lilibet were not granted the titles of prince, princess, or HRH. However, following Queen Elizabeth II's passing in 2022, they became eligible for such titles. It was confirmed after Lilibet's christening in March 2023 that both Archie and his sister had been bestowed with prince and princess titles.
As outlined on their now-defunct website SussexRoyal.com, Harry and Meghan had previously declared their intention not to actively use their HRH titles as they transitioned away from their roles as working members of the royal family. Nevertheless, they would retain their duke and duchess titles.