The British  socialite and artist Rosemary Pratt married this Royal Air Force officer, flying ace, courtier and author who served as what to King George VI?
Rosemary Pratt, Marchioness Camden Rosemary Pratt, Marchioness Camden (9 May 1921 – 27 February 2004), born Cecil Rosemary Pawle, was a British socialite and artist, best known as the first wife of Group Captain Peter Townsend, who later became romantically involved with Princess Margaret of the United Kingdom.
Prince John of the United Kingdom Prince John of the United Kingdom (John Charles Francis; 12 July 1905 – 18 January 1919) was the fifth son and youngest of the six children born to King George V and his wife, Queen Mary. At the time of John's birth, his father was the Prince of Wales and heir apparent to the reigning monarch of the United Kingdom, Edward VII. In 1910, George succeeded to the throne upon Edward's death and John became the fifth in line of succession.