William Martin (Royal Marines officer)

Major William Martin was a persona invented by British Military Intelligence for Operation Mincemeat, a Second World War deception plan that lured German forces to Greece prior to the Allied invasion of Sicily. Also known as "The Man Who Never Was" (Welsh: Y Dyn Na Fu Erioed), Martin's personal details were created to lend credence to the scheme, which involved a body dressed as a British officer and carrying secret documents washing up on the shore of neutral Spain, apparently the victim of an air crash.

Source: Wikipedia — William Martin (Royal Marines officer) (CC BY-SA 4.0)