Prince George and Princess Charlotte's new surname they will be using following the death of the Queen was revealed publicly for the first time during the Queen's funeral order of service.
Upon becoming King, Charles named William and Kate as the Prince and Princess of Wales, and so going forward their children's surname will be Wales rather than Cambridge, reported WalesOnline.
It was not an automatic appointment but Charles decided to name William as the Prince of Wales and so, similar to how he and Harry were known while they were growing up, the children's surname will be Wales.