Geoffrey Langdon Keynes was born at Harvey Rd, Cambridge, on 25 March 1887, the third child and second son of Dr John Neville Keynes, ScD, the registrar of Cambridge University, and of Florence Ada Keynes, a daughter of Dr John Brown, pastor of the Bunyan (Congregational) Meeting in Bedford. Geoffre

Born on 5 June at Hemel Hempstead the second of the three sons of the Rev Travers Clark, he was a grandson of Frederick Le Gros Clark, President of the College in 1874, member of Council from 1864 to 1879 and surgeon to St Thomas's Hospital. For his education Le Gros Clark went to Blundell's School,