 Leonora Louise Marie Elizabeth Knatchbull (25 June 1986 – 22 October 1991)  was the youngest of the three children of the 3rd Earl Mountbatten of Burma, who was styled Lord Romsey during her lifetime.She was born in London.She died after a one-year battle against a cancerous kidney tumour, at St Bartholomew's Hospital in London, at the age of five.