- Laajala
- Laake
- Labao
- Labaume
- Labba
- Labbe
- Laborde
- Labouve
- Labove
- Labrie
- Labrode
- Lacamu
- Lacarna
- Lacasse
- Lacerra
- Lacey
- Lachman
- Lachmansingh
- Lachner
- Lachney
- Lackey
- Lackner
- Lacle
- Lacobie
- Lacomb
- Lacombe
- Lacorte
- Lacoste
- Lactson
- Lacy
- Laday
- Ladd
- Laddie
- Lade
- Ladet
- Ladin
- Ladjevardian
- Ladnier
- Ladson
- Laduck
- Laedtke
- Lafayette
- Lafevor
- Lafferty
- Lafitte
- Lafleur
- Lafoe
- Lafond
- Laforge
- Lagard
- Lagera
- Lagerquist
- Lagrone
- Laguarta
- Laguna
- Lagunas
- Lagway
- Lahai-Momoh
- Lahana
- Lahoti
- Lai
- Laigle
- Laing
- Lair
- Laird
- Lairson
- Lait
- Laitkep
- Lajaunie
- Lake
- Laker
- Lakey
- Lakocinski
- Lakshmanan
- Lakshmi
- Lala
- Lale
- Lalich
- Lalor
- Lalouf
- Lam
- Laman
- Lamar
- Lamarche
- Lamas
- Lamb
- Lambert
- Lamberth
- Lambertilistl
- Lambeth
- Lambright
- Lamela
- Lamell
- Lamford
- Lamme
- Lammons
- Lamont
- Lamonte
- Lamoreaux
- Lamoreux
- Lamotte
- Lampazzi
- Lampkin
- Lamport
- Lamson
- Lan
- Lanasa
- Lancaster
- Lance
- Lanceley
- Lancione
- Lanclos
- Land
- Landa
- Landaverde
- Landbeth
- Lande
- Lander
- Landers
- Landes
- Landgrebe
- Landin
- Landini
- Landis
- Landon
- Landor
- Landreneau
- Landress
- Landrum
- Landry
- Lane
- Laneave
- Lang
- Langard
- Langdon
- Lange
- Langer
- Langerud
- Langford
- Langhorne
- Langit
- Langley
- Langlinais
- Langner
- Langston
- Langwith
- Lanham
- Laniak
- Lanier
- Lanigan
- Lanik
- Lankford
- Lannom
- Lanoran
- Lanoue
- Lansch
- Lansdell
- Lanza
- Lapaglia
- Lapidus
- Lapinta
- Laplant
- Laplante
- Laporte
- Laposki
- Lapp
- Laprade
- Lapushin
- Lara
- Laraia
- Laras
- Lareau
- Laredo
- Larey
- Largent
- Larick
- Larimore
- Lariviere
- Larkin
- Larkins
- Larks
- Larotta
- Larrabee
- Larrinaga
- Larrison
- Larry
- Larsen
- Larson
- Larue
- Lary
- Lasater
- Lasell
- Lash
- Lasker
- Lasley
- Lass
- Lassen
- Lassere
- Lassus
- Laster
- Lastrape
- Laswell
- Latch
- Lathan
- Lathouse
- Latimer
- Latin
- Latner
- Latoison
- Latour
- Latrache
- Latson
- Lattimer
- Lattin
- Lau
- Laub
- Laudermilk
- Laudin
- Lauersdorf
- Laufman
- Lauga
- Laughlin
- Laughrun
- Lauhaff
- Laurenzana
- Laurion
- Lauve
- Lauze
- Lavalais
- Lavalley
- Lavan
- Lavender
- Laventon
- Lavergne
- Laviage
- Laviolette
- Lavoie
- Lawal
- Lawch
- Lawder
- Lawhon
- Lawler
- Lawless
- Lawrence
- Laws
- Lawson
- Lawton
- Lax
- Laxen
- Laxson
- Lay
- Laycock
- Layne
- Layos
- Layton
- Lazalde
- Lazard
- Lazare
- Lazarine
- Lazaroff
- Lazarone
- Lazauskas
- Lazcano
- Lazenby
- Lazo
- Lazure
- Lazzeri
- Le
- Le An
- Le Bao
- Le Chau
- Le Chinh
- Le Hoang
- Le Lam
- Le Long
- Le Ly
- Le Mau
- Le Nam
- Le Ngan
- Le Thomas
- Le Tien
- Le Tung
- Lea
- Leach
- Leahy
- Leake
- Leaks
- Leal
- Learakos
- Leard
- Leared
- Learned
- Leas
- Leason
- Leatherman
- Leathers
- Leatherwood
- Leavens
- Leaver
- Leber
- Lebinh
- Lebioda
- Leblanc
- Leboeuf
- Lebouef
- Lebow
- Leclair
- Leclare
- Lecznar
- Ledbetter
- Lederer
- Lederman
- Ledesma
- Ledet
- Ledezma
- Ledford
- Ledgister
- Ledig
- Ledin
- Lednicky
- Ledoux
- Ledwell
- Lee
- Leech
- Leehey
- Leeper
- Lees
- Leeson
- Lefiles
- Lefkowitz
- Lefler
- Legare
- Leger
- Legerski
- Legg
- Leggett
- Legier
- Legrand
- Legrande
- Legrange
- Legris
- Legro
- Leguay
- Lehew
- Lehmann
- Lehotsky
- Lehr
- Lehrman
- Lehtinen
- Leibas
- Leiber
- Leifeste
- Leigh
- Leightman
- Leighton
- Leija
- Leipold
- Leisk
- Leist
- Leivas
- Leland
- Leleux
- Lem
- Lemaire
- Lemburg
- Lemell
- Lemen
- Lemieux
- Lemire
- Lemmer
- Lemon
- Lemons
- Lemp
- Lempel
- Lemus
- Lemuth
- Lenaerts
- Lenar
- Lengefeld
- Lengyel
- Lennear
- Lennis
- Lennon
- Lenoir
- Lenox
- Lentjes
- Lentschke
- Lentz
- Lenz
- Leon
- Leonard
- Leonardo
- Leone
- Leonetti
- Leong
- Leoni
- Leopold
- Leos
- Lequang
- Lerma
- Lerner
- Lero
- Lery
- Lesage
- Lesandrini
- Lesher
- Leskin
- Leslie
- Lesperance
- Lessels
- Lester
- Lestingi
- Lestrer
- Leszinske
- Lethridge
- Letsos
- Letsou
- Letz
- Leuenberger
- Leung
- Levan
- Levandoski
- Levendoski
- Leverett
- Leverette
- Leverich
- Levi
- Levien
- Levin
- Levine
- Levingston
- Levitch
- Levy
- Lew
- Lewallen
- Lewandowski
- Lewellen
- Lewelling
- Lewellyn
- Lewing
- Lewis
- Lewman
- Leyendecker
- Lezak
- Lezama
- Li
- Lianekeo
- Liang
- Liao
- Liaw
- Libby
- Liberman
- Liboys
- Licarione
- Licefi
- Lichtenstein
- Lidbetter
- Liddell
- Liddie
- Lidiak
- Lidsky
- Lieberman
- Liebgold
- Liebl
- Liebling
- Liechty
- Liedtke
- Lien
- Lienhard
- Lieu
- Liewer
- Liggins
- Liggio
- Liggitt
- Light
- Lightfoot
- Lightsey
- Ligon
- Lihou
- Likins
- Liles
- Lilie
- Liljestrand
- Lillard
- Lilley
- Lillico
- Lilly
- Lim
- Lima
- Limbada
- Limbert
- Limon
- Limones
- Lin
- Linares
- Linbeck
- Lincecum
- Lincoln
- Lindamood
- Lindberg
- Lindblom
- Lindee
- Lindeen
- Lindemann
- Lindenmoyer
- Linder
- Linderman
- Lindheim
- Lindholm
- Lindhurst
- Lindig
- Lindley
- Lindner
- Lindquist
- Lindrose
- Lindsay
- Lindsey
- Lineberger
- Linehan
- Liner
- Lines
- Ling
- Linhart
- Link
- Linker
- Linscomb
- Linskey
- Linsley
- Linson
- Lintner
- Linton
- Liollio
- Lionti
- Lipkin
- Lipman
- Lipnick
- Lippert
- Lippincott
- Lipps
- Lipschutz
- Lipshultz
- Lipsky
- Lira
- Liras
- Liska
- Lisnitzer
- Lister
- Listi
- Listvan
- Litchenberg
- Littell
- Little
- Littlejohn
- Littleton
- Littman
- Litton
- Littwitz
- Litzman
- Liu
- Liuzza
- Livanec
- Lively
- Livermore
- Livers
- Liversidge
- Livings
- Livingston
- Lizcano
- Lizik
- Ljubojevich
- Llagostera
- Llamas
- Llanas
- Llanes
- Llano
- Llewellyn
- Llorence
- Llorens
- Lloyd
- Lo
- Loaeza
- Lobazzo
- Lobb
- Lobberecht
- Lober
- Lobo
- Locascio
- Lochridge
- Lock
- Locke
- Lockett
- Lockhardt
- Lockhart
- Lockings
- Lockler
- Lockridge
- Lockwood
- Lococo
- Loden
- Lodge
- Lodico
- Lodinger
- Loe
- Loeb
- Loeffler
- Loep
- Loera
- Loesch
- Loeser
- Loewenstern
- Lofft
- Lofland
- Lofthouse
- Loftis
- Lofton
- Logan
- Logans
- Logsdon
- Logue
- Loh
- Lohec
- Loi
- Lojo
- Lokken
- Lollis
- Lomax
- Lombard
- Lombardo
- Lombrana
- Lomprey
- Londa
- Lonergan
- Long
- Longbotham
- Longino
- Longley
- Longmire
- Longobardi
- Longoria
- Longshore
- Longwell
- Lonzetta
- Loo
- Look
- Loomis
- Loonam
- Looser
- Loosley
- Lopagukhina
- Lopez
- Lopshire
- Lora
- Lorch
- Lord
- Loredo
- Lorentz
- Lorentzatos
- Lorenz
- Lorenzen
- Lorenzi
- Loria
- Lorino
- Lorquet
- Lott
- Lou
- Loucel
- Loud
- Loudd
- Louder
- Loughlin
- Louie
- Loukas
- Loup
- Loupe
- Louton
- Louvet
- Lovdahl
- Love
- Lovelace
- Lovelady
- Loveless
- Lovell
- Loverdi
- Lovett
- Loville
- Loving
- Lovings
- Low
- Lowe
- Lowenberg
- Lowenkron
- Lower
- Lowery
- Lowicki
- Lowndes
- Lowry
- Lowther
- Lowy
- Loya
- Loyd
- Lozano
- Lozica
- Lozmack
- Lu
- Luangskulpanizh
- Lubanko
- Lubel
- Lubritz
- Luc
- Lucan
- Lucas
- Lucci
- Luce
- Lucero
- Lucey
- Lucia
- Luciani
- Lucio
- Luckett
- Luckey
- Luckie
- Lucky
- Lucrezi
- Lucy
- Ludden
- Ludeke
- Luder
- Ludtke
- Ludwick
- Ludwig
- Ludwigsen
- Lueb
- Luebe
- Lueck
- Luecken
- Lueders
- Luedke
- Luedtke
- Luehr
- Luengas
- Luening
- Luera
- Luevano
- Lugo
- Luhnau
- Luiz
- Luk
- Lukens
- Luker
- Lukoschek
- Lum
- Lumahan
- Luman
- Lumba
- Lummus
- Lumpkin
- Luna
- Lund
- Lunday
- Lunden
- Lundquist
- Lundstedt
- Lundvall
- Lundy
- Lungaro
- Lungwitz
- Lunington
- Lunsford
- Lunsmann
- Lunstroth
- Lunt
- Luo
- Luong
- Lupardus
- Lupo
- Luprete
- Lupu
- Lurie
- Lurton
- Lusardi
- Lusby
- Lusk
- Lussier
- Luster
- Lustgarten
- Lutes
- Lutostanski
- Lutringer
- Lutsch
- Lutz
- Luu
- Luyando
- Ly
- Lydon
- Lykos
- Lyle
- Lyles
- Lyman
- Lynam
- Lynch
- Lynn
- Lynskey
- Lyon
- Lyons
- Lyssyj
- Lytle