Namesakes
American First Ladies:
1 first lady
Florence Harding 1921-1923 
American Presidents:
1 president
Warren G. Harding 1921-1923
Fictional Characters from Television:
1 character
Tess Harding 1999 Roswell
Olympic Medalists:
1 silver
(silver) Phyllis Harding 1924 swimming - 100 m backstroke
Pulitzer Award Winners:
1 literature
(literature) Paul Harding 2010 Tinkers
Saints:
1 saint
Saint Stephen Harding ?-1134