Stephen John Keynes OBE FLS (born 19 October 1927) a great-grandson of Charles Darwin, is chairman of the Charles Darwin Trust. Keynes is the fourth son of Geoffrey Keynes, and his wife Elizabeth Darwin, daughter of Sir George Darwin. His brothers are Richard, Quentin and Milo. In 1955 he married Mary Cecilia Knatchbull-Hugessen, daughter of the Canadian senator Adrian Knatchbull-Hugessen.Wikipedia
The definitive Wikipedia entry for Stephen Keynes. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Stephen_Keynes