Major Leonard Darwin (15 January 1850–26 March 1943)

Eighth child of Charles and Emma Darwin. He joined the Royal Engineers in 1871 and was promoted to Major in 1890. He left the Army in 1893 and in 1895 became a Liberal Unionist MP for Lichfield constituency in Staffordshire. He was President of the Royal Geographical Society from 1908 to 1911 and Chairman of the British Eugenics Society between 1911 and 1928 and became its honorary President from 1928 until his death in 1950.