Namesakes
Eurovision Song Contest Winners:
1 winner
Martin Lee (a.k.a. Barnes) 1976 United Kingdom 
Fictional Characters from Television:
4 characters
Cliff Barnes 1978 Dallas
Willard "Digger" Barnes 1978 Dallas
Pam Ewing (a.k.a. Barnes) 1978 Dallas
C. J. Barnes 2002 8 Simple Rules
Notable Actors and Entertainers:
2 actors
Priscilla Barnes 1954-
Ben Barnes 1981-
Notable Evildoers:
1 gangster
"Machine Gun" Kelly Barnes 1900-1954
Notable Writers:
1 author, 1 author/poet
Djuna Barnes 1892-1982
Julian Barnes 1946-
Olympic Medalists:
3 gold, 1 bronze, 1 silver/gold
(gold) Lee Barnes 1924 pole vault
(gold) Jim Barnes 1964 basketball
(silver/gold) Randy Barnes 1988; 1996 shot put
(bronze) Paddy Barnes 2008; 2012 boxing
(gold) Harrison Barnes 2016 basketball
Pulitzer Award Winners:
1 literature
(literature) Margaret Ayer Barnes 1931 Years of Grace
Rock and Roll Hall-of-Famers:
1 musician
Prentiss Barnes 2000 The Moonglows