Sir Winston Churchill, son of Lord and Lady Randolph Churchill, and grandson of the 7th Duke of Marlborough, was Prime Minister of the United Kingdom between 10 May 1940–26 July 1945 and 26 October 1951–6 April 1955. In 1908, Churchill married Clementine Hozier, the daughter of Sir Henry and Lady Blanche Hozier. By Clementine, Churchill had five children and ten grandchildren, a number of whom are well known in their own right.