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