William "Wee Willie" Davis (1906–1981) was an American film actor. He had previously been a wrestler. He worked in the Jefferson County Jail in Louisville in 1972-75 as the gym guard. He was also an engineer and contributed to the invention of the Glowmeter, an early Heads up display that projected a cars speed onto the windshield. A fellow wrestler, Prince Ilaki Ibn Ali Hassan (whose real name was Agisilaki Mihalakis) who also fought as the Mad Greek was the primary inventor.