| Author Name | Profession | Nationality |
| L. Frank Baum | Author | American |
| L. Sprague De Camp | Author | American |
| L. Wolfe Gilbert | Musician | Russian |
| Lactantius | Author | |
| Lady Bird Johnson | First Lady | American |
| Lady Gaga | Musician | American |
| Laetitia Casta | Model | French |
| Lamar Alexander | Politician | American |
| Lance Bass | Musician | American |
| Lance Ito | Judge | American |
| Lane Evans | Politician | American |
| Lara St. John | Musician | Canadian |
| Larry David | Actor | American |
| Larry Elder | Journalist | American |
| Larry Ellison | Businessman | American |
| Larry Flynt | Publisher | American |
| Larry Gelbart | Writer | American |
| Larry Hagman | Actor | American |
| Larry Harvey | Celebrity | American |
| Larry King | Entertainer | American |
| Lascelles Abercrombie | Poet | British |
| Lasse Hallstrom | Director | Swedish |
| Latoya Jackson | Musician | American |
| Laura Carmichael | Actress | British |
| Laura Dern | Actress | American |
| Laura Ingraham | Celebrity | American |
| Laura Innes | Actress | American |
| Laura Kightlinger | Comedian | American |
| Laura San Giacomo | Actress | American |
| Laurel Lee | ||
| Laurell K. Hamilton | Writer | American |
| Lauren Alaina | Musician | American |
| Lauren Ambrose | Actress | American |
| Lauren Bacall | Actress | American |
| Laurence Fishburne | Actor | American |
| Laurence Harvey | Actor | Lithuanian |
| Laurent Fabius | Statesman | French |
| Laurent Jalabert | Athlete | French |
| Laurent Lamothe | Public Servant | Haitian |
| Laurie Lee | Poet | English |
| Laurieann Gibson | Director | Canadian |
| Lawrence Barrett | Actor | American |
| Lawrence Eagleburger | Diplomat | American |
| Lawrence Ferlinghetti | Poet | American |
| Lawrence Halprin | Architect | American |
| Lawrence Hargrave | Scientist | Australian |
| Lawrence Jackson | Athlete | American |
| Lawrence Kasdan | Producer | American |
| Lea Delaria | Comedian | American |
| Learned Hand | Judge | American |
| Lebron James | Athlete | American |
| Lee Dewyze | Musician | American |
| Lee H. Hamilton | Politician | American |
| Lee Haney | Athlete | American |
| Lee Iacocca | Businessman | American |
| Leeza Gibbons | Celebrity | American |
| Leif Garrett | Musician | American |
| Leila Josefowicz | Musician | Canadian |
| Len Cariou | Actor | Canadian |
| Len Dawson | Athlete | American |
| Len Deighton | Historian | British |
| Leo Aikman | ||
| Leo Baekeland | Inventor | Belgian |
| Leo Delibes | Composer | French |
| Leo Fender | Businessman | American |
| Leon Battista Alberti | Architect | Italian |
| Leon Edel | Critic | American |
| Leon Gambetta | Politician | French |
| Leon Jaworski | Public Servant | American |
| Leon Jouhaux | Leader | French |
| Leon Kass | Educator | American |
| Leonard Bacon | Clergyman | American |
| Leonard Bailey | Inventor | American |
| Leonard Baskin | Artist | American |
| Leonardo Davinci | Artist | Italian |
| Leonhard Euler | Mathematician | Swiss |
| Leonora Carrington | Artist | British |
| Les Baxter | Musician | American |
| Les Dawson | Comedian | English |
| Lesley Garrett | Musician | English |
| Leslie Banks | Actor | British |
| Leslie Caron | Actress | French |
| Leslie Easterbrook | Actress | American |
| Leslie Fiedler | Critic | American |
| Leslie Jamison | Novelist | American |
| Lester Bangs | Critic | American |
| Letitia Elizabeth Landon | Poet | English |
| Levi Eshkol | Statesman | Israeli |
| Lewis Carroll | Author | English |
| Lewis Cass | Soldier | American |
| Lewis Gilbert | Director | British |
| Lewis H. Lapham | Editor | American |
| Lewis Hallam | Actor | |
| Lewis J. Bates | ||
| Li Keqiang | Politician | Chinese |
| Liam Gallagher | Musician | British |
| Lianne La Havas | Musician | English |
| Liberty Hyde Bailey | Scientist | American |
| Lil' Kim | Musician | American |
| Lillian Gish | Entertainer | American |
| Lillian Gordy Carter | Celebrity | American |
| Lillie Langtry | Actress | British |
| Lilly Ledbetter | Activist | American |
| Lily Aldridge | Model | American |
| Lily James | Actress | English |
| Lincoln Davis | Politician | American |
| Lincoln Ellsworth | Explorer | American |
| Linda Cardellini | Actress | American |
| Linda Ellerbee | Journalist | American |
| Linda Evangelista | Model | Canadian |
| Linda Evans | Actress | American |
| Linda Fiorentino | Actress | American |
| Linda Hamilton | Actress | American |
| Linda Lavin | Actress | American |
| Lindsay Davenport | Athlete | American |
| Lindsay Ellingson | Model | American |
| Linwood Barclay | Author | Canadian |
| Lion Feuchtwanger | Novelist | German |
| Lionel Barrymore | Actor | American |
| Lionel Hampton | Musician | American |
| Lionel Jospin | Statesman | French |
| Lisa Gardner | Author | American |
| Lisa Nicole Carson | Actress | American |
| Lita Ford | Musician | American |
| Liz Carpenter | Writer | American |
| Lizzy Caplan | Actress | American |
| Ll Cool J | Musician | American |
| Lloyd Alexander | Writer | American |
| Lloyd Banks | Musician | American |
| Lloyd Kaufman | Director | American |
| Logan Marshall Green | Actor | American |
| Lois Capps | Politician | American |
| Lonnie Earl Johnson | Criminal | American |
| Lord Acton | Historian | British |
| Lord Amherst | Soldier | British |
| Lord Caradon | Diplomat | British |
| Lord Edward Cecil | Soldier | British |
| Lord Hailsham | Politician | British |
| Lord Halifax | Politician | British |
| Lord Harlech | Politician | British |
| Lord Jeffrey | ||
| Lord Kelvin | Scientist | Irish |
| Lord Patrick Devlin | Lawyer | British |
| Lord Thomson Of Fleet | Publisher | Canadian |
| Loren Eiseley | Scientist | American |
| Lorenz Hart | ||
| Lorenzo Di Bonaventura | Producer | American |
| Loretta Devine | Actress | American |
| Lorin Maazel | Musician | American |
| Lorraine Hansberry | Playwright | American |
| Lorrie Fair | Athlete | American |
| Lotte Lehmann | Musician | German |
| Lou Barletta | Politician | American |
| Lou Ferrigno | Actor | American |
| Lou Gehrig | Athlete | American |
| Lou Gerstner | Businessman | American |
| Lou Harrison | Composer | American |
| Louis A. Johnson | Public Servant | American |
| Louis Agassiz | Scientist | Swiss |
| Louis Althusser | Philosopher | Algerian |
| Louis Farrakhan | Activist | American |
| Louis Ferdinand Celine | Writer | French |
| Louis Finkelstein | Clergyman | American |
| Louis Gerstner | Businessman | American |
| Louis Jacques Mande Daguerre | Artist | French |
| Louis Jordan | Musician | American |
| Louis Kahn | Architect | American |
| Louis L'amour | Author | American |
| Louis Leakey | Scientist | British |
| Louisa May Alcott | Novelist | American |
| Louise Erdrich | Writer | American |
| Louise Fletcher | Actress | American |
| Louise Hart | ||
| Louise J. Kaplan | ||
| Louise Jameson | Actress | British |
| Luc Dardenne | Director | Belgian |
| Luc Ferrari | Composer | French |
| Luciano De Crescenzo | Writer | Italian |
| Lucille Ball | Comedian | American |
| Lucille Roybal Allard | ||
| Lucius Accius | Poet | Italian |
| Lucy Alibar | Writer | American |
| Lucy Hale | Actress | American |
| Lucy Larcom | Poet | American |
| Lucy Lawless | Actress | New Zealander |
| Ludovic Halevy | Author | French |
| Ludwig Erhard | Politician | German |
| Luigi Barzini | Journalist | Italian |
| Luis Barragan | Architect | Mexican |
| Luis Figo | Athlete | Portuguese |
| Lukas Haas | Actor | American |
| Luke Evans | Actor | Welsh |
| Luke Ford | Writer | Australian |
| Luther Allison | Musician | American |
| Luther Campbell | Musician | American |
| Lyle Alzado | Athlete | American |
| Lyman Abbott | Author | American |
| Lynda Barry | Cartoonist | American |
| Lynda Carter | Actress | American |
| Lyndon B. Johnson | President | American |
| Lyndsy Fonseca | Actress | American |
| Lynn Abbey | Author | American |
| Lynn Barber | Journalist | British |
| Lynn Davies | Athlete | British |
| Lynn Fontanne | Actress | American |
| Lynn Johnston | Cartoonist | American |
| Lynn Lavner | Comedian | American |
| Lynndie England | Criminal | American |
“I know that I can sing really loud. It's like having that really big Evinrude engine on the back of your fishing boat. But I've been trying to be more dynamic with my voice, and not just singing on 10 all of the time out of terror.”
