Scottish geneticist (son of John Haldane) who contributed to the development of population genetics; a popularizer of science and a Marxist (1892-1964)
Scottish physiologist and brother of Richard Haldane and Elizabeth Haldane; noted for research into industrial diseases (1860-1936)
Scottish writer and sister of Richard Haldane and John Haldane (1862-1937)
Scottish statesman and brother of Elizabeth and John Haldane (1856-1928)