- Labelle 119
- Labonte 127
- Laborde 64
- Laboy 21
- Lacey 492
- Lachance 104
- Lackey 473
- Lacombe 66
- Lacroix 204
- Lacy 573
- Ladd 459
- Ladner 119
- Lafferty 280
- Lafleur 193
- Lafrance 79
- Laguna 30
- Lagunas 8
- Lai 262
- Lail 88
- Laing 152
- Laird 584
- Lally 212
- Lalonde 96
- Lam 930
- Lamb 1763
- Lambert 2700
- Lamm 165
- Lammers 150
- Lampe 120
- Lampkin 62
- Lancaster 961
- Landa 45
- Landau 154
- Lander 132
- Landeros 34
- Landers 490
- Landes 112
- Landis 716
- Landon 199
- Landreth 86
- Landrum 266
- Landry 1198
- Lane 3538
- Laney 235
- Lang 1849
- Langan 149
- Langdon 261
- Lange 1057
- Langer 220
- Langford 527
- Langley 796
- Langlois 180
- Langston 506
- Lanham 235
- Lanier 574
- Lankford 275
- Lanning 208
- Lantz 350
- Lanza 124
- Lao 16
- Lapierre 92
- Laplante 176
- Lapointe 215
- Laporte 171
- Lara 483
- Large 158
- Larios 49
- Larkin 754
- Larkins 101
- Larocca 122
- Laroche 106
- Larosa 146
- Larose 143
- Larrabee 75
- Larsen 1815
- Larson 3744
- Larue 257
- Lasalle 43
- Lash 158
- Lasher 90
- Lashley 109
- Laskowski 101
- Lasley 69
- Lassiter 310
- Laster 121
- Latham 576
- Lathrop 214
- Latimer 248
- Latorre 51
- Latta 124
- Lattimore 49
- Lau 693
- Lauderdale 56
- Lauer 425
- Laughlin 532
- Laureano 21
- Laurent 90
- Lavallee 125
- Lavelle 185
- Lavender 135
- Lavigne 174
- Lavin 187
- Lavoie 263
- Law 882
- Lawhorn 71
- Lawler 502
- Lawless 267
- Lawlor 186
- Lawrence 3344
- Laws 353
- Lawson 3152
- Lawton 347
- Lawyer 71
- Layman 311
- Layne 318
- Lazar 176
- Lazarus 114
- Lazo 82
- Leach 1298
- Leahy 400
- Leak 57
- Leake 137
- Leal 318
- Lear 190
- Leary 513
- Leasure 75
- Leatherman 119
- Leathers 86
- Leatherwood 77
- Leavitt 282
- Lebeau 84
- Leblanc 1262
- Lebron 58
- Leclair 208
- Ledbetter 530
- Ledesma 126
- Ledet 63
- Ledezma 33
- Ledford 580
- Ledoux 118
- Leduc 98
- Lee 11468
- Leech 108
- Leeper 152
- Lees 153
- Lefebvre 153
- Lefevre 124
- Leffler 140
- Leftwich 54
- Leger 212
- Legg 236
- Leggett 298
- Legrand 81
- Lehman 1190
- Lehmann 311
- Lehr 181
- Lei 81
- Leighton 204
- Leija 25
- Leiva 31
- Lejeune 106
- Lemaster 154
- Lemay 191
- Lemieux 190
- Lemke 342
- Lemley 88
- Lemmon 121
- Lemoine 133
- Lemon 321
- Lemos 57
- Lemus 125
- Lenhart 141
- Lennon 302
- Lent 114
- Lentz 486
- Lenz 399
- Leon 690
- Leonard 2661
- Leone 533
- Leong 140
- Leos 29
- Lepore 156
- Lerma 54
- Lerner 308
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- Lessard 121
- Lesser 109
- Lester 1215
- Letourneau 114
- Lett 110
- Leung 491
- Levan 92
- Levasseur 91
- Leverett 32
- Levesque 335
- Levin 755
- Levine 1488
- Levinson 155
- Levitt 170
- Levy 1385
- Lew 137
- Lewallen 81
- Lewandowski 384
- Lewin 115
- Lewis 9765
- Ley 99
- Leyva 117
- Liang 320
- Liao 71
- Libby 317
- Liddell 82
- Lieberman 293
- Liggett 87
- Liggins 37
- Light 504
- Lightfoot 164
- Lightner 115
- Ligon 110
- Liles 235
- Lillard 80
- Lilley 209
- Lilly 527
- Lim 480
- Lima 194
- Limon 72
- Lin 999
- Linares 91
- Lincoln 440
- Lind 478
- Lindberg 336
- Lindeman 121
- Lindemann 117
- Linden 158
- Linder 388
- Lindgren 227
- Lindley 261
- Lindner 203
- Lindquist 338
- Lindsay 924
- Lindsey 1609
- Lindstrom 291
- Lingle 88
- Link 791
- Linn 376
- Linville 154
- Lippert 161
- Lipscomb 278
- Lira 65
- List 96
- Lister 175
- Liston 96
- Litchfield 89
- Little 2959
- Littlefield 250
- Littlejohn 208
- Littleton 241
- Litton 97
- Littrell 86
- Liu 1005
- Lively 263
- Livengood 96
- Livingston 1126
- Lizarraga 30
- Llamas 54
- Llanos 8
- Llewellyn 147
- Lloyd 1796
- Lo 237
- Lobo 29
- Lockard 141
- Locke 832
- Lockett 181
- Lockhart 686
- Locklear 296
- Lockridge 48
- Lockwood 574
- Lodge 94
- Loeffler 145
- Loera 63
- Loftin 160
- Loftis 138
- Lofton 179
- Loftus 267
- Logan 1797
- Loggins 98
- Logsdon 289
- Logue 221
- Lohman 115
- Lohr 214
- Lomas 30
- Lomax 138
- Lombard 152
- Lombardi 506
- Lombardo 488
- Lomeli 75
- London 340
- Long 5584
- Longo 447
- Longoria 112
- Loomis 440
- Looney 324
- Loos 99
- Loper 162
- Lopes 271
- Lopez 5912
- Lord 765
- Loredo 34
- Lorenz 516
- Lott 620
- Loucks 149
- Loudermilk 66
- Lovato 59
- Love 2073
- Lovejoy 142
- Lovelace 342
- Lovelady 51
- Loveland 105
- Loveless 217
- Lovell 637
- Lovely 75
- Lovett 446
- Loving 137
- Low 323
- Lowder 112
- Lowe 2533
- Lowery 1107
- Lowman 145
- Lowrey 118
- Lowry 738
- Lowther 75
- Loy 215
- Loya 70
- Loza 41
- Lozada 42
- Lozano 459
- Lu 297
- Lubin 63
- Lucas 2715
- Luce 244
- Lucero 469
- Luck 126
- Luckett 103
- Luckey 81
- Ludwig 830
- Luevano 21
- Lugo 264
- Lui 86
- Lujan 205
- Lukas 105
- Luker 68
- Lumpkin 156
- Luna 795
- Lund 883
- Lundberg 226
- Lundgren 205
- Lundquist 199
- Lundy 353
- Lunn 92
- Lunsford 404
- Luo 61
- Luong 111
- Lupo 153
- Lusk 312
- Lussier 98
- Luster 97
- Luttrell 236
- Lutz 1156
- Luu 169
- Lux 143
- Ly 278
- Lydon 125
- Lykins 61
- Lyles 288
- Lyman 292
- Lynch 3220
- Lyon 925
- Lyons 2270
- Lytle 350
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