Namesakes
Fictional Characters from Television:
1 character
Sabrina Duncan 1976 Charlie's Angels 
Hall-of-Famers:
1 basketball
(basketball) Tim Duncan 2020
Most Valuable Players:
1 winner
Tim Duncan 2002; 2003 basketball
Notable Actors and Entertainers:
1 actor, 1 dancer
Isadora Duncan 1877-1927
Michael Clarke Duncan 1957-2012
Notable Athletes:
1 basketball
(basketball) Tim Duncan 1976-
Olympic Medalists:
2 bronze
(bronze) James Duncan 1912 discus throw
(bronze) Tim Duncan 2004 basketball