Namesakes
American Presidents:
1 president
James Buchanan 1857-1861 
Fictional Characters from Books:
2 characters
Daisy Buchanan 1925 The Great Gatsby
Tom Buchanan 1925 The Great Gatsby
Fictional Characters from Television:
1 character
Bill Buchanan 2001 24
Hall-of-Famers:
1 football
(football) Buck Buchanan 1990
Nobel Prize Winners:
1 economics
(economics) James M. Buchanan Jr. 1986
Notable Actors and Entertainers:
3 actors
Edgar Buchanan 1903-1979
Colin Buchanan 1966-
Tanner Buchanan 1998-
Olympic Medalists:
1 bronze
(bronze) Glenn Buchanan 1984 swimming - 100 m butterfly; swimming - 4x100 m medley relay