- La
- La Commare
- Labar
- Lacazotte
- Lacombe
- Lacoste
- Lague
- Lal
- Lamance
- Landrum
- Lara
- Lawler
- Leach
- Lederle
- Lee
- Leensvaart
- Legorreta
- Leib
- Lenahan
- Lewis
- Li
- Lichty
- Lilley
- Limbaugh
- Lindsay
- Lionudakis
- Lipko
- Litt
- Littlefield
- Livesay
- Locke
- Long
- Looper
- Lopes
- Lopez
- Lopshire
- Lorenz
- Lorenzo
- Losinski
- Losole
- Louie
- Love
- Lowe
- Lowery
- Lozano
- Lucas
- Lucchesi
- Ludwig
- Luis
- Luiz
- Luke
- Luper
- Luth
- Lynch
- Lyons