Donald Duart Maclean (1913-1983) was one of four members of MI5 who acted as spies for Russia in the Second World War. He defected to Russia in 1951 after his secret as a spy was revealed. He was the son of a Cabinet Minister (see below).
Sir Donald Maclean (1864-1932) was a Liberal MP for Bath (1906-1910), Peebles and Selkirk (1910-1918), Peebles and South Midlothian (1918-1922), and Northern Division of Cornwall (1929-1932) and served as president of the Board of Education (1931-1932).
