Hon. Nicholas Timothy Charles Knatchbull (18 November 1964-27 August 1979) was the son of John Ulick Knatchbull, 7th Baron Brabourne (b. 1924) and his wife Patricia Mountbatten (now Countess Mountbatten of Burma) (b. 1924), twin brother of Timothy Knatchbull, and grandson of Lord Mountbatten. He was killed by an IRA bomb, while sailing off the coast of Ireland in Donegal Bay, along with his famous grandfather.