Prince William, Duke of Cambridge, would have the title Prince or Princess and the style Royal Highness. Accordingly, Prince William's eldest son, born on 22 July 2013, was styled His Royal Highness Prince George of Cambridge. His daughter, born on 2 May 2015, was styled Her Royal Highness Princess Charlotte of Cambridge. His second son, born on 23 April 2018, was styled His Royal Highness Prince Louis of Cambridge. Styles of British princes Sovereign's heir apparent if Prince of Wales – HRH The Prince of Wales. Sovereign's sons (not Prince of Wales) with peerage – HRH The Prince X, Duke of Y (with Y being the territorial designation of their highest peerage), e.g., HRH The Prince Harry, Duke of Sussex. Sovereign's sons without peerage – HRH The Prince X, e.g., HRH The Prince John. Sovereign's male line grandsons with peerage – HRH Prince "X", Duke of "Y" (with Y being the territorial designation of their highest title), e.g., HRH Prince Edward, Duke of Kent. Sovereign's male line grandsons without peerage – HRH Prince "X" of "Y" (with Y being the territorial designation of their father's highest title), e.g., HRH Prince Michael of Kent. Sovereign's great-grandsons whose father is the oldest son of the heir apparent – HRH Prince "X" of "Y" (with Y being the territorial designation of their father's highest title), e.g., His Royal Highness Prince George of Cambridge. List of British princes since 1714 The descendants of Ernest Augustus, Duke of Brunswick, head of the House of Hanover and the senior male-line descendant of King George III, who bear the title Prince or Princess of the United Kingdom with the style of Royal Highness as a secondary title of pretense. Of the 58 British princes listed here, two are spouses of a reigning Queen, and eight lost their title after World War I. – In letters patent dated 20 November 1917, King George V restricted the title of Prince to the children of the sovereign, the children of the sovereign's sons, and the eldest living son of the eldest son of the Prince of Wales. – By an Order in Council dated 28 March 1919, as authorized by the Titles Deprivation Act 1917, King George V suspended the British peerage titles, princely dignities and honours of those who sided with Germany in World War I. See also List of current British princes and princesses British royal family List