Namesakes
American Presidents:
1 president
Bill Clinton (middle name Jefferson) 1993-2001 
Fictional Characters from Television:
2 characters
J. D. "Boss" Hogg (a.k.a. Jefferson) 1979 The Dukes of Hazzard
Jefferson D'Arcy 1987 Married... with Children
Notable Actors and Entertainers:
1 actor
Reeve Carney (middle name Jefferson) 1983-
Notable Athletes:
2 soccer
(soccer) Jefferson 1983-
(soccer) Jefferson Montero 1989-
Notable Musicians:
1 singer
Reeve Carney (middle name Jefferson) 1983-
Olympic Medalists:
1 gold/silver
(gold/silver) Jefferson Pérez 1996; 2008 20 km walk