David Farnsworth (born December 5, 1744 - April 17, 1775) is a distant ancestor of Professor Farnsworth and is notoriously known as a traitor to the American Revolution, having forged counterfeit dollar bills and half pennies. When Hubert Farnsworth learns this from George Washington's head, he uses all the Earth's small quantity of crystalline opal on Washington's head and licks him, transporting himself, Fry, Leela and Bender to colonial-era New York. Eventually tracking down David, with the aid of Benjamin Franklin and Paul Revere, Farnsworth knocks out his ancestor with a candle, saving the family name.