The Duncans
- John Duncan, Sr. (1919–1988), Mayor of Knoxville, Tennessee 1959–1965; U.S. Representative from Tennessee 1965–1988. Father of John J. Duncan, Jr.
- John J. Duncan, Jr. (1947–), Tennessee State Judge 1981–1988, U.S. Representative from Tennessee 1988–present. Son of John Duncan, Sr.
Read more about this topic: List Of United States Political Families (D)