Namesakes
American First Ladies:
1 first lady
Harriet Lane 1857-1861 
Fictional Characters from Books:
1 character, 1 hero
Harriet Smith 1815 Emma
Harriet Welsch 1964 Harriet the Spy
Fictional Characters from Television:
1 character
Harry Makepeace 1985 Dempsey and Makepeace
Notable Activists and Revolutionaries:
1 activist
(activist) Harriet Tubman c. 1822-1913
Notable Actors and Entertainers:
5 actors
Harriet Nelson 1909-1994
Harriet Walter 1950-
Serena Scott Thomas (middle name Harriet) 1961-
Cleo King (a.k.a. Harriet) 1962-
Phoebe Dynevor (middle name Harriet) 1995-
Notable Explorers and Adventurers:
1 explorer
Harriet Quimby 1875-1912
Notable Writers:
1 author
Harriet Beecher Stowe 1811-1896
Olympic Medalists:
1 gold
(gold) Harriet Bland 1936 4x100 m relay