L
- Lafarge – Joseph-Auguste Pavin de Lafarge
- Laidlaw – Robert Laidlaw
- Lamborghini – Ferruccio Lamborghini
- Lancia – Vicenzo Lancia
- Lane Bryant – Lena Bryant (first name misspelled by a bank officer when she opened her company's first bank account)
- Larrousse – Gérard Larrousse
- Lauda Air – Niki Lauda
- Lavazza – Luigi Lavazza
- Laverda – Pietro Laverda
- Lazard – Alexandre Lazard, Simon Lazard, and Elie Lazard
- LDS – Louis Douglas Serrurier
- Lee Enterprises – A. W. Lee
- Lagardère Group – Jean-Luc Lagardère
- Lehman Brothers – Henry Lehman, Emanuel Lehman, and Meyer Lehman
- Leica Camera, Leica Geosystems and Leica Microsystems – Ernst Leitz II (Leitz Camera)
- LeMond Racing Cycles – Greg LeMond
- Leslie – Donald Leslie
- Lesney Products – Leslie Smith and Rodney Smith
- Levi Strauss & Co. – Levi Strauss
- Li Ning Company Limited – Li Ning
- Lidl – named for Ludwig Lidl
- Life – Ernesto Vita (surname is Italian for life)
- Ligier – Guy Ligier
- Lincoln National Corporation – to convey the integrity of U.S. President Abraham Lincoln
- Livingston International - Gerry Livingston
- Liz Claiborne – Liz Claiborne
- L.L.Bean - Leon Leonwood Bean
- Lockheed Corporation (to Lockheed Martin) – Allan Haines Loughead and Malcolm Loughead
- Loews Theatres and Loews Corporation – Marcus Loew
- Lonsdale – Hugh Cecil Lowther, 5th Earl of Lonsdale
- Lorillard Tobacco Company – Pierre Abraham Lorillard
- Lotte – The Sorrows of Young Werther character Charlotte
- Louis B. Mayer Pictures (to Metro-Goldwyn-Mayer) – Louis B. Mayer
- Louis Vuitton – Louis Vuitton
- Lowe Alpine and its offshoot Lowepro – Greg, Jeff, and Mike Lowe (founders)
- Lucasfilm – George Lucas
- LVMH – see separate entries of Louis Vuitton, Moët et Chandon, and Hennessy
Read more about this topic: List Of Companies Named After People