Nathaniel Mayer Victor Rothschild, 3rd Baron Rothschild, (31 October 1910 – 20 March 1990), was a biologist and cricketer while at University of Cambridge, an officer of the UK Security Service (MI5) during World War II, a senior executive with Royal Dutch Shell and N M Rothschild & Sons, an advisor to the UK Edward Heath and Margaret Thatcher governments.