Namesakes
American First Ladies:
1 first lady
Lou Henry Hoover (a.k.a. Louise) 1929-1933 
Belgian Prime Ministers:
1 prime minister
Guy Verhofstadt (a.k.a. Louise) 1999-2008
Fictional Characters from Books:
1 character
Jean Louise Finch 1960 To Kill a Mockingbird
Fictional Characters from Movies:
1 hero
Ellen Ripley (a.k.a. Louise) 1979 Alien
Fictional Characters from Plays and Musicals:
1 character
Louise Bigelow 1945 Carousel
Fictional Characters from Television:
1 character
Louise Grant 2000 Gilmore Girls
Nobel Prize Winners:
1 literature
(literature) Louise Glück 2020
Notable Actors and Actresses:
15 actresses, 1 model/actress
Elmarie Wendel (a.k.a. Louise) 1928-2018
June Squibb (a.k.a. Louise) 1929-
Louise Fletcher 1934-
Irène Tunc (a.k.a. Louise) 1934-1972
Louise Sorel 1940-
Sondra Locke (a.k.a. Louise) 1944-2018
Andrea Martin (a.k.a. Louise) 1947-
Hetty Baynes (a.k.a. Louise) 1956-
Mary-Louise Parker 1964-
Thea Gill (a.k.a. Louise) 1970-
Louise Lombard 1970-
Amy Acker (a.k.a. Louise) 1976-
Andrea Riseborough (a.k.a. Louise) 1981-
Gemma Atkinson (a.k.a. Louise) 1984-
Jenna Coleman (a.k.a. Louise) 1986-
Cara Theobold (a.k.a. Louise) 1990-
Notable Athletes:
1 basketball
(basketball) Tully Bevilaqua (a.k.a. Louise) 1972-
Notable Filmmakers:
1 director
Sam Taylor-Johnson (a.k.a. Louise) 1967-
Notable Hosts and Presenters:
1 television
(television) Esther Rantzen (a.k.a. Louise) 1940-
Notable Musicians:
2 musicians, 1 singer
Aretha Franklin (a.k.a. Louise) 1942-2018 soul
Anneke Grönloh (a.k.a. Louise) 1942-
Madonna (a.k.a. Louise) 1958- pop
Notable Politicians and Statespeople:
2 politicians
Sarah Palin (a.k.a. Louise) 1964-
Marianne Thieme (a.k.a. Louise) 1972-
Notable Writers:
1 author, 1 author/poet
Louise Erdrich 1954-
A. L. Kennedy (a.k.a. Louise) 1965-
Olympic Medalists:
7 gold, 5 bronze, 5 silver, 2 silver/gold, 1 bronze/gold, 1 bronze/silver, 1 silver/bronze
(silver) Louise Otto 1912 swimming - 4x100 m freestyle relay
(gold) Mary Carew (a.k.a. Louise) 1932 4x100 m relay
(silver/bronze) Katherine Rawls (a.k.a. Louise) 1932; 1936 diving - springboard; swimming - 4x100 m freestyle relay
(bronze) Lily Carlstedt (a.k.a. Louise) 1948 javelin throw
(gold) Marie Corridon (a.k.a. Louise) 1948 swimming - 4x100 m freestyle relay
(bronze/silver) Marie-Louise Linssen-Vaessen 1948; 1952 swimming - 100 m freestyle; swimming - 4x100 m freestyle relay
(bronze) Marilee Stepan (a.k.a. Louise) 1952 swimming - 4x100 m freestyle relay
(gold) Mildred McDaniel (a.k.a. Louise) 1956 high jump
(bronze/gold) Jane Barkman (a.k.a. Louise) 1968; 1972 swimming - 200 m freestyle; swimming - 4x100 m freestyle relay
(gold) Melissa Belote (a.k.a. Louise) 1972 swimming - 100 m backstroke; swimming - 200 m backstroke; swimming - 4x100 m medley relay
(silver) Linda Jezek (a.k.a. Louise) 1976 swimming - 4x100 m medley relay
(gold) Louise Ritter 1988 high jump
(gold) Cindy Brown (a.k.a. Louise) 1988 basketball
(silver) Louise Currey 1996 javelin throw
(bronze) Louise Jöhncke 2000 swimming - 4x100 m freestyle relay
(silver) Tanith Belbin (a.k.a. Louise) 2006 figure skating
(silver) Tully Bevilaqua (a.k.a. Louise) 2008 basketball
(bronze) Beth Storry (a.k.a. Louise) 2012 field hockey
(bronze) Kate Richardson-Walsh (a.k.a. Louise) 2012 field hockey
(silver/gold) Victoria Pendleton (a.k.a. Louise) 2008; 2012 cycling - track
(silver/gold) Kami Craig (a.k.a. Louise) 2008; 2012 water polo
(gold) Jamie Anderson (a.k.a. Louise) 2014 snowboarding
Oscar Award Winners:
1 actress
(actress) Louise Fletcher 1975 One Flew Over the Cuckoo's Nest
Other Leaders:
1 president
President Marie-Louise Coleiro Preca 2014- Malta
Other Royalty:
4 princesses, 1 queen
Paulina of Orange-Nassau (a.k.a. Louise) 1800-1806 Netherlands
Marianne of the Netherlands (a.k.a. Louise) 1815-1883 Netherlands
Sophie of the Netherlands (a.k.a. Louise) 1824-1897 Netherlands
Juliana of the Netherlands (a.k.a. Louise) 1948-1980 Netherlands
Märtha Louise of Norway 1971- Norway
Pulitzer Award Winners:
1 winner
Louise Erdrich 2009 The Plague of Doves
Saints:
2 blessed, 2 saints
Blessed Louise of Savoy 1461-1503
Saint Louise de Marillac 1591-1660
Saint Louise of Omura ?-1628
Blessed Louise Therese de Montaignac de Chauvance 1820-1885