Norma Duffield Stong "Duffy" Lyon (July 29, 1929 – June 26, 2011) was an American farmer and artist nicknamed The Butter Cow Lady.
Lyon was born in Nashville, Tennessee on July 29, 1929, the daughter of Benton J. Stong, a newspaper reporter, and his wife, Elsa.
Her grandmother, Bertha Clark, was a founder of the Knoxville Symphony Orchestra, and her uncle, Phil Stong, wrote the book State Fair, which was later made into three movies and a stage musical.
She later expanded to creating other sculptures, including Garth Brooks, Elvis Presley, John Wayne, Peanuts characters, a Harley-Davidson motorcycle, American Gothic by Grant Wood and the Last Supper.
Lyon appeared on To Tell the Truth in 1963, and was correctly identified as the Butter Cow Lady by two of the panelists, Kitty Carlisle and Tom Poston.