John Caulfield Hannyngton (7 March 1807 – 1885 or 1886) was a British military commander, actuary and mathematician.
He joined the British Army as a cadet in 1825 and was posted to India with the 24th Regiment of Native Infantry.
On the suppression of the Colekan rebellion in 1839 he was given a political appointment, and in 1842 promoted to Judicial Commissioner.
It was manufactured in England by Aston & Mander[1] and a demonstration of its capabilities was made by one Galbraith SFTCD before students of Trinity College Engineering School and reported in Freeman's Journal of 11 June 1884.
Son John Child Hannyngton (23 September 1835 – March 1895) was born in Barrackpore.