Philip Henry Kerr, 11th Marquess of Lothian, (1882-1940) was a British political figure and diplomat. From 1905 to 1910, Kerr served in the South African government and was part of Lord Milner’s ‘kindergarten’, a group of reformist civil servants advocating an Imperial Federation. In 1910, he founded the Round Table Journal. Kerr served as private secretary to Prime Minister David Lloyd George between 1916 and 1921, and was later Britain’s Ambassador to the United States (1939-40).