John or Johnny Duncan may refer to: == Arts and entertainment == John Duncan (painter) (1866–1945), Scottish painter John Duncan (harpist) (1904–1998), English musician Johnny Duncan (actor) (1923–2016), American actor Johnny Duncan (bluegrass musician) (1931–2000), American skiffle and bluegrass musician Johnny Duncan (country singer) (1938–2006), American country-music singer John Duncan (American artist) (born 1953), American artist and musician Big John Duncan (born 1958), Scottish punk musician == Law, military, and politics == John Holt Duncan (1820–1896), American lawyer and judge,... [more on Wikipedia]