Her Royal Highness Beatrice of Battenburg became…

… Her Royal Highness Beatrice of Mountbatten.. when King George IV suceeded her mother to the throne of England in 1917.  Her last official public appearance was at his burial in 1944 when she was 87 years old.

(Photo:  King George IV and wife Mary on their wedding day in 1893.  THIS shows the HEIGHT of world fashion of the day – the corset is of particular note, plus the shape of the dress.  Bustles were out; Edwardian skirts were coming in)