Namesakes
American First Ladies:
1 first lady
Lucy Webb Hayes 1877-1881 
Fictional Characters from Books:
2 characters, 1 hero
Lucy Steele 1811 Sense and Sensibility
Lucy Westenra 1897 Dracula
Lucy Pevensie 1950 The Lion, the Witch and the Wardrobe
Fictional Characters from Television:
2 characters
Lucy Ricardo 1951 I Love Lucy
Lucy Hatcher 1997 The Practice
Notable Actors and Actresses:
4 actresses
Lucy Lawless 1968-
Lucy Liu 1968-
Lucy Russell 1972-
Lucy Hale 1989-
Notable Hosts and Presenters:
2 television
(television) Nigella Lawson (a.k.a. Lucy) 1960-
(television) Davina McCall (a.k.a. Lucy) 1967-
Notable Writers:
1 author
Lucy Maud Montgomery 1874-1942
Olympic Medalists:
2 gold
(gold) Lucy Morton 1924 swimming - 200 m breaststroke
(gold) Albina Osipowich (a.k.a. Lucy) 1928 swimming - 100 m freestyle; swimming - 4x100 m freestyle relay
Other Fictional Characters:
1 character
Lucy van Pelt 1952 comic strip
Saints:
6 saints, 3 blessed
Saint Lucy ?-300
Saint Lucy ?-304
Saint Lucia the Chaste (a.k.a. Lucy) ?-1420
Blessed Lucia Brocadelli of Narni (a.k.a. Lucy) 1476-1544
Blessed Lucy de Freitas ?-1622
Blessed Lucy Chakichi ?-1622
Saint Lucia Filippini (a.k.a. Lucy) 1672-1732
Saint Lucy Pak Hui-sun 1800-1839
Saint Lucy Yi Zhenmei ?-1862
Title Characters:
7 songs, 5 books, 1 film
(song) Lucy 1964 Linus And Lucy
(song) Lucy 1967 Lucy In The Sky With Diamonds
(song) Lucy 1978 Almost Lucy
(song) Lucy Jordan 1979 The Ballad Of Lucy Jordan
(book) Lucy 1990 Lucy
(book) Lucy Sullivan 1996 Lucy Sullivan Is Getting Married
(book) Lucy 2002 He Loves Lucy
(film) Lucy 2002 I'm with Lucy
(song) Lucy 2009 Lucy
(song) Lucy 2009 Lucy
(song) Lucy 2010 Lucy
(book) Lucy 2012 Lucy
(book) Lucy 2012 The Pursuit of Lucy Banning