Son of
John Brabourne and
Patricia Mountbatten. Brother of
Norton Knatchbull,
Michael John Knatchbull, Joanna, Amanda, and
Philip Knatchbull. His twin brother, Nicholas Timothy Charles Knatchbull was killed by the IRA in 1979. He is uncle of
Kelly Knatchbull, and has five children of his own, Amber, Milo, Ludovic, Isla, and Wilhelmina.