Namesakes
Fictional Characters from Television:
1 character
Harding Welsh 1994 Due South 
Olympic Medalists:
1 gold, 1 silver
(gold) Ellery Harding Clark 1896 high jump; long jump
(silver) Samuel Duvall (a.k.a. Harding) 1904 archery - team round
Tolkien's Characters:
2 characters
Harding of the Hill (m)
Harding (m)