Belgian Prime Ministers: 3 prime ministers
Joseph Lebeau (a.k.a. Louis)   1831; 1840-1841  
Jules Renkin (a.k.a. Louis)   1931-1932  
Joseph Pholien (a.k.a. Louis)   1950-1952  
Bohemian Kings: 1 king
King Ludvík (a.k.a. Louis)   1516-1526  
Canadian Prime Ministers: 1 prime minister
Louis St. Laurent   1948-1957  
Dutch Prime Ministers: 1 prime minister
Louis Beel   1946-1948; 1958-1959  
Eurovision Song Contest Winners: 1 winner
Louis Herrey   1984   Sweden  
Fictional Characters from Books: 1 character, 1 hero
Louis Trevelyan   1869   He Knew He Was Right  
André-Louis Moreau   1921   Scaramouche  
Fictional Characters from Television: 3 characters
Lou Rodriguez   1984   Miami Vice  
Lou Carpenter (a.k.a. Louis)   1985   Neighbours  
Louis Gardino   1994   Due South  
Frankish and French Kings: 22 kings, 1 emperor
King Clovis I (a.k.a. Louis)   481-511  
King Clovis II (a.k.a. Louis)   639-655  
King Clovis III (a.k.a. Louis)   675-676  
King Clovis IV (a.k.a. Louis)   691-695  
King Louis I the Pious   813-840  
King Louis II the Stammerer   877-879  
King Louis III   879-882  
King Louis IV the Foreigner   936-954  
King Louis V the Indolent   986-987  
King Louis VI the Fat   1108-1137  
King Louis VII   1137-1180  
King Louis VIII the Lion   1223-1226  
King Louis IX   1226-1270  
King Louis X   1314-1316  
King Louis XI the Spider   1461-1483  
King Louis XII of Orleans   1498-1515  
King Louis XIII   1610-1643  
King Louis XIV the Sun King   1643-1715  
King Louis XV   1715-1774  
King Louis XVI   1774-1792  
King Louis XVIII   1814-1824  
King Louis Philippe   1830-1848  
Emperor Napoleon III (a.k.a. Louis)   1852-1870  
French Presidents and Prime Ministers: 8 prime ministers, 3 presidents, 1 prime minister/president
(prime minister/president) Adolphe Thiers (a.k.a. Louis)   1836; 1840; 1871-1873  
(prime minister) Louis-Mathieu Molé   1836-1839; 1848  
(prime minister) Louis-Eugène Cavaignac   1848  
(president) Louis-Napoléon Bonaparte   1848-1852  
(prime minister) Louis-Jules Trochu   1870-1871  
(prime minister) Ernest Courtot de Cissey (a.k.a. Louis)   1874-1875  
(prime minister) Louis Buffet   1875-1876  
(prime minister) Charles de Freycinet (a.k.a. Louis)   1879-1880; 1882; 1886; 1890-1892  
(prime minister) Émile Combes (a.k.a. Louis)   1902-1905  
(prime minister) Louis Barthou   1913  
(president) Paul Deschanel (a.k.a. Louis)   1920  
(president) Alain Poher (a.k.a. Louis)   1969; 1974  
German Kings and Holy Roman Emperors: 1 emperor, 1 king, 1 king-emperor
Emperor Ludwig I the Pious (a.k.a. Louis)   813-840  
King Ludwig III the Child (a.k.a. Louis)   900-911  
King-Emperor Ludwig IV (a.k.a. Louis)   1314-1347  
Haitian Presidents: 6 presidents
(president) Jean-Louis Pierrot   1845-1846  
(president) Lysius Salomon (a.k.a. Louis)   1879-1888  
(president) Florvil Hyppolite (a.k.a. Louis)   1889-1896  
(president) Louis Borno   1922-1930  
(president) Louis Eugène Roy   1930  
(president) Élie Lescot (a.k.a. Louis)   1941-1946  
Hall-of-Famers: 5 baseball, 4 football, 2 basketball
(baseball) Lou Gehrig   1939  
(baseball) Lou Boudreau   1970  
(football) Lou Groza   1974  
(baseball) Hank Aaron (a.k.a. Louis)   1982  
(baseball) Lou Brock   1985  
(football) Lou Creekmur   1996  
(football) Hank Stram (a.k.a. Louis)   2003  
(baseball) Louis Santop   2006  
(basketball) Louie Dampier   2014  
(basketball) Lou Hudson   2022  
(football) Chuck Howley (a.k.a. Louis)   2023  
Hungarian Kings and Queens: 2 kings
King Lajos I the Great (a.k.a. Louis)   1342-1382  
King Lajos II (a.k.a. Louis)   1516-1526  
Most Valuable Players: 3 winners
Lou Gehrig   1927; 1936   baseball  
Lou Boudreau   1948   baseball  
Hank Aaron (a.k.a. Louis)   1957   baseball  
Nobel Prize Winners: 2 medicine, 2 physics, 1 chemistry, 1 peace
(peace) Louis Renault   1907  
(medicine) Charles Louis Alphonse Laveran   1907  
(physics) Louis de Broglie   1929  
(physics) Louis Néel   1970  
(medicine) Louis Ignarro   1998  
(chemistry) Louis E. Brus   2023  
Notable Actors and Entertainers: 10 actors, 1 actor/comedian, 1 comedian
Lew Cody (a.k.a. Louis)   1884-1934  
Larry Fine (a.k.a. Louis)   1902-1975  
Louis de Funès   1914-1983  
Louis Zorich   1924-2018  
Jean-Louis Trintignant   1930-2022  
Louis Gossett, Jr.   1936-2024  
Lou Ferrigno   1951-  
Lou Diamond Phillips   1962-  
Louis Mandylor   1966-  
Louis C.K.   1967-  
Robinson Stévenin (a.k.a. Louis)   1981-  
Louis Hofmann   1997-  
Notable Artists: 2 painters, 1 architect, 1 drawer/painter/printmaker, 1 fashion designer
Jacques-Louis David   1748-1825  
Louis Vuitton   1821-1892  
Louis Sullivan   1856-1924  
Lovis Corinth (a.k.a. Louis)   1858-1925  
Louis Wain   1860-1939  
Notable Athletes: 4 baseball, 1 basketball, 1 boxing, 1 football, 1 rugby, 1 soccer
(baseball) Lou Gehrig   1903-1941  
(boxing) Joe Louis (a.k.a. Louis)   1914-1981  
(baseball) Lou Boudreau   1917-2001  
(baseball) Hank Aaron (a.k.a. Louis)   1934-2021  
(baseball) Lou Brock   1939-2020  
(basketball) Louie Dampier   1944-  
(soccer) Louis van Gaal   1951-  
(rugby) Louis Picamoles   1986-  
(football) Manti Te'o (a.k.a. Louis)   1991-  
Notable Businesspeople: 5 businesspersons
Louis Vuitton   1821-1892  
Louis Cartier   1875-1942  
Louis Renault   1877-1944  
Louis Chevrolet   1878-1941  
Louis B. Mayer   1884-1957  
Notable Explorers and Adventurers: 2 explorers
Louis Hennepin   1626-1705  
Louis Antoine de Bougainville   1729-1811  
Notable Filmmakers: 1 producer
Louis B. Mayer   1884-1957  
Notable Journalists: 1 journalist
(journalist) H. L. Mencken (a.k.a. Louis)   1880-1956  
Notable Musicians: 3 composers, 2 singers, 1 musician
Louis-Claude Daquin   1694-1772  
Hervé (a.k.a. Louis)   1825-1892  
Louis Armstrong   1901-1971  
Leonard Bernstein (a.k.a. Louis)   1918-1990  
Albert Hammond (a.k.a. Louis)   1944-  
Louis Tomlinson   1991-  
Notable Philosophers and Thinkers: 2 mathematicians
Joseph Louis Lagrange   1736-1813  
Augustin-Louis Cauchy   1789-1857  
Notable Scientists and Inventors: 3 inventors, 2 chemists, 2 physicists, 1 naturalist, 1 physician
Georges-Louis Leclerc   1707-1788  
Joseph Louis Gay-Lussac   1778-1850  
Louis Daguerre   1787-1851  
Louis Braille   1809-1852  
Louis Pasteur   1822-1895  
Charles Louis Alphonse Laveran   1845-1922  
Louis Blériot   1872-1936  
Louis de Broglie   1892-1987  
Louis Néel   1904-2000  
Notable Writers: 7 authors, 1 author/poet, 1 poet
Robert Louis Stevenson   1850-1894  
Louis Couperus   1863-1923  
Louis-Ferdinand Céline   1894-1961  
Louis Bromfield   1896-1956  
Louis Aragon   1897-1982  
Jack Kerouac (a.k.a. Louis)   1922-1969  
Jin Yong (a.k.a. Louis)   1924-2018  
Thomas Berger (a.k.a. Louis)   1924-2014  
Martin Amis (a.k.a. Louis)   1949-2023  
Olympic Medalists: 8 bronze, 8 gold, 5 silver/gold, 4 silver, 1 bronze/gold/silver, 1 bronze/silver
(bronze) Louis Glineur   1900   archery - à la pyramide  
(bronze) Louis Martin   1900   swimming - 200 m team; swimming - 4000 m freestyle  
(bronze) Louis Laufray   1900   water polo  
(gold) Louis W. Maxson   1904   archery - team round  
(gold) Louis Handley   1904   swimming - 4x50 yard freestyle relay  
(silver) Albert Corey (a.k.a. Louis)   1904   4 mile team; marathon  
(bronze) Louis Wilkins   1904   pole vault  
(silver) Louis Vernet   1908   archery - continental style 50 m  
(bronze) Louis Bonniot de Fleurac   1908   3 mile team  
(silver) Lewis Tewanina (a.k.a. Louis)   1912   10000 m  
(gold) Louis Scott   1912   3000 m team  
(silver) Charles Lelong (a.k.a. Louis)   1912   4x400 m relay  
(bronze/gold/silver) Julien Brule (a.k.a. Louis)   1920   archery - moving target 28 m, team; archery - moving target 33 m; archery - moving target 33 m, team; archery - moving target 50 m; archery - moving target 50 m, team  
(silver/gold) Louis Fierens   1920   archery - moving target 28 m, team; archery - moving target 33 m, team; archery - moving target 50 m, team  
(silver/gold) Louis Van de Perck   1920   archery - large fixed target; archery - large fixed target, team; archery - small fixed target; archery - small fixed target, team  
(bronze) Louis Balbach   1920   diving - springboard  
(gold) Louis Kuehn   1920   diving - springboard  
(silver/gold) Louis Delcon   1920   archery - moving target 28 m, team; archery - moving target 33 m, team; archery - moving target 50 m, team  
(silver/gold) Louis Van Beeck   1920   archery - moving target 28 m, team; archery - moving target 33 m, team; archery - moving target 50 m, team  
(gold) Louis Clarke   1924   4x100 m relay  
(gold) Lou Jones   1956   4x400 m relay  
(gold) Bob Boozer (a.k.a. Louis)   1960   basketball  
(bronze) Paul Genevay (a.k.a. Louis)   1964   4x100 m relay  
(gold) Joe Caldwell (a.k.a. Louis)   1964   basketball  
(silver/gold) Sam Graddy III (a.k.a. Louis)   1984   100 m; 4x100 m relay  
(bronze) Lou Marson   2008   baseball  
(bronze/silver) Louis Smith   2008; 2012   artistic gymnastics  
Oscar Award Winners: 1 actor
(actor) Louis Gossett, Jr.   1983   An Officer and a Gentleman  
Other Royalty: 8 princes, 1 grand duke, 1 king
Louis of Guyenne   1397-1415   France  
Heinrich of Prussia (a.k.a. Louis)   1900-1904   Prussia  
Louis Ferdinand of Prussia   1907-1994   Prussia  
Louis II, Prince of Monaco   1922-1949   Monaco  
Edward, Duke of Edinburgh (a.k.a. Louis)   1964-   United Kingdom  
Jean, Grand Duke of Luxembourg (a.k.a. Louis)   1964-2000   Luxembourg  
William, Prince of Wales (a.k.a. Louis)   1982-   United Kingdom  
Philippe (a.k.a. Louis)   2013-   Belgium  
George of Wales (a.k.a. Louis)   2013-   United Kingdom  
Louis of Wales   2018-   United Kingdom  
Polish High Dukes and Kings: 1 king
King Ludwik I (a.k.a. Louis)   1370-1382  
Pulitzer Award Winners: 1 literature
(literature) Louis Bromfield   1927   Early Autumn  
Saints: 15 blessed, 7 saints
Saint Louis   ?-855  
Blessed Louis of Thuringia   1200-1227  
Saint Louis IX   1214-1270  
Saint Louis of Toulouse   1274-1297  
Blessed Ludovico Morbioli (a.k.a. Louis)   1433-1485  
Saint Luis Bertrán (a.k.a. Louis)   1526-1581  
Blessed Luis Sotelo (a.k.a. Louis)   1574-1624  
Saint Luis Ibarachi (a.k.a. Louis)   1585-1597  
Blessed Louis Chakichi   ?-1622  
Blessed Louis Kawara   ?-1622  
Blessed Luis Flores (a.k.a. Louis)   ?-1622  
Blessed Louis Baba   ?-1624  
Blessed Luis Sasanda (a.k.a. Louis)   ?-1624  
Blessed Louis Onizuka Naisen   ?-1626  
Blessed Louis Maki   ?-1627  
Blessed Louis Someyon   ?-1627  
Blessed Luis Bertrán the Younger (a.k.a. Louis)   ?-1627  
Blessed Louis Nifaki   ?-1628  
Saint Louis-Marie de Montfort   1673-1716  
Saint Jean-Louis Bonnard   1824-1852  
Blessed Louis-Zéphirin Moreau   1824-1901  
Blessed Luigi Beltrame Quattrocchi (a.k.a. Louis)   1880-1951  
Shakespearian Characters: 3 characters
Louis the Dauphin   King John  
Louis the Dauphin   Henry V; King John  
Lewis XI (a.k.a. Louis)   Henry VI (3)  
Spanish Kings and Queens: 1 king
King Luis I (a.k.a. Louis)   1724     
Swedish Prime Ministers: 2 prime ministers
Louis Gerhard De Geer   1876-1880  
Louis De Geer   1920-1921  
Swiss Presidents: 2 presidents
Louis Ruchonnet   1883; 1890  
Felix Calonder (a.k.a. Louis)   1918