| La Casa y otros | 4 |
| La Cadena | 1 |
| La Iglesia | 8 |
| Lapedrera | 7 |
| La Peña | 1 |
| La Rocha | 7 |
| Labairu | 6 |
| Labari | 5 |
| Labarta | 3 |
| Labastida | 5 |
| Labay | 63 |
| Labayen | 4 |
| Laberri | 1 |
| Labiano | 61 |
| Laborda | 60 |
| Laboreria | 38 |
| Laborra | 131 |
| Lacabe | 29 |
| Lacadena | 3 |
| Lacasa | 111 |
| Lacasaña | 6 |
| Lacave | 28 |
| Lacosta | 2 |
| Lacruz | 3 |
| Lacuey | 46 |
| Lacunza | 7 |
| Ladiezma | 3 |
| Ladron | 58 |
| Laera | 1 |
| Lafita | 5 |
| Laflor | 1 |
| Lafosa | 19 |
| Lafuente | 17 |
| Lago | 1 |
| Laguardia | 4 |
| Lahoz | 4 |
| Laide | 1 |
| Lamaña | 4 |
| Lamo | 7 |
| Lamuedra | 2 |
| Lana | 1 |
| Lanau | 2 |
| Landa | 16 |
| Landarech | 20 |
| Landerri | 6 |
| Landivar | 38 |
| Landrebia | 2 |
| Lanz | 3 |
| Lanzaco | 8 |
| Lanzarote | 1 |
| Laoz | 2 |
| Lapedrera | 12 |
| Lapetra | 1 |
| Lapieza | 12 |
| Laplaza | 3 |
| Laporta | 3 |
| Laquei | 3 |
| Laquey | 2 |
| Lara | 5 |
| Larde | 1 |
| Larendegui | 1 |
| Larequi | 93 |
| Lariñaque | 2 |
| Larios | 2 |
| Larocha | 1 |
| Larradet | 1 |
| Larraga | 4 |
| Larraice | 1 |
| Larrainza | 9 |
| Larrainzar | 4 |
| Larramendi | 32 |
| Larran | 12 |
| Larrañeta | 100 |
| Larrangoz | 2 |
| Larrasoaña | 1 |
| Larraun | 15 |
| Larraz | 21 |
| Larrea | 38 |
| Larregla | 1 |
| Larraimpe | 7 |
| Larripa | 32 |
| Larriqueta | 1 |
| Larrosa | 3 |
| Larrua | 1 |
| Larumbe | 4 |
| Larvi | 1 |
| Lasa | 40 |
| Lasaca | 1 |
| Lasala | 5 |
| Lassa | 2 |
| Lastiesas | 6 |
| Lastuey | 1 |
| Latorre | 29 |
| Laurendi | 1 |
| Lautre | 10 |
| Lavari | 18 |
| Lavayen | 1 |
| Lavena | 6 |
| Laviano | 3 |
| Laviña | 21 |
| Lazagutia | 1 |
| Lazcorreta | 6 |
| Lea | 1 |
| Leach | 2 |
| Leache | 4 |
| Learte | 50 |
| Lecaroz | 2 |
| Lecumberri | 8 |
| Ledo | 1 |
| Legaria | 6 |
| Legasa | 3 |
| Lembroy | 1 |
| Leon | 5 |
| Leoz | 95 |
| Lera | 4 |
| Lerena | 16 |
| Lerendegui | 14 |
| Lerga | 67 |
| Leruzz | 1 |
| Les | 17 |
| Lesaca | 1 |
| Lescar | 1 |
| Lesuel | 1 |
| Leza | 1 |
| Lezaun | 1 |
| Liarte | 4 |
| Libarren | 4 |
| Liedena | 13 |
| Lijue | 1 |
| Liñan | 8 |
| Lino | 1 |
| Linzoain | 2 |
| Linzuain | 5 |
| Lira | 5 |
| Lisarre | 2 |
| Lisarri | 2 |
| Litago | 1 |
| Lizarbe | 2 |
| Lizarraga | 7 |
| Lizaso | 4 |
| Lizoain | 36 |
| Lizondo | 1 |
| Lizuain | 52 |
| Lobaco | 17 |
| Lobera | 78 |
| Longas | 28 |
| Lope Sanz | 26 |
| Loperret | 1 |
| Lopez | 287 |
| Lora | 12 |
| Lorbes | 3 |
| Lorea | 3 |
| Lorena | 2 |
| Loreña | 5 |
| Lorendi | 9 |
| Lorente | 1 |
| Lorenz | 1 |
| Lorenzo | 1 |
| Lores | 8 |
| Loriente | 5 |
| Loriz | 1 |
| Lorves | 5 |
| Los Arcos | 200 |
| Lostardoy | 1 |
| Lovera | 3 |
| Loya | 22 |
| Lozano | 194 |
| Lubian | 25 |
| Luciente | 2 |
| Lue | 12 |
| Lumbier | 49 |
| Luna | 5 |
| Lurbes | 14 |
| Lusa | 3 |
| Lusarreta | 5 |
| Luxea | 4 |
| Llena | 8 |
| Lloriente | 2 |
| Maceiras | 1 |
| Macerolles | 1 |
| Macharrena | 1 |
| Machin | 153 |
| Machiriain | 1 |
| Maestre | 2 |
| Maestro | 1 |
| Magallon | 1 |
| Magaz | 1 |
| Maguregui | 4 |
| Mainz | 1 |
| Maisterra | 1 |
| Malagana | 1 |
| Manahon | 2 |
| Mañano | 1 |
| Mancho | 19 |
| Manent | 1 |
| Mangado | 3 |
| Mangas | 1 |
| Manso | 1 |
| Maquirriain | 3 |
| Maraña | 1 |
| Marca | 1 |
| Marcalain | 2 |
| Marcellan | 5 |
| Marcial | 1 |
| Marcilla | 43 |
| Marco | 250 |
| Marcos | 5 |
| Marcuello | 8 |
| Marchalain | 1 |
| Marcheta | 1 |
| Marchueta | 30 |
| Mariategui | 14 |
| Marimorales | 3 |
| Marin | 4 |
| Marinelerena | 1 |
| Marinez | 1 |
| Marquina | 3 |
| Marquinez | 3 |
| Marraco | 1 |
| Martin | 8 |
| Martinez | 429 |
| Martirena | 1 |
| Martiz | 3 |
| Marzal | 1 |
| Masa | 1 |
| Mascaron | 7 |
| Mateo | 27 |
| Matriain | 1 |
| Matrival | 1 |
| Mauleon | 7 |
| Mauregui | 2 |
| Maya | 29 |
| Mayayo | 3 |
| Mayo | 2 |
| Mazo Del | 1 |
| Meategui | 53 |
| Medina | 5 |
| Medioroz | 1 |
| Melero | 11 |
| Melida | 2 |
| Mena | 9 |
| Mendaña | 1 |
| Mendez | 7 |
| Mendia | 17 |
| Mendigacha | 20 |
| Mendioroz | 42 |
| Mendive | 31 |
| Mendoza | 22 |
| Mendox | 1 |
| Mengoechea | 1 |
| Meoqui | 15 |
| Meoz | 30 |
| Mercite | 2 |
| Mesa | 1 |
| Mezqueta | 1 |
| Mezquiriz | 8 |
| Michelena | 8 |
| Miedes | 3 |
| Miguel | 37 |
| Miguelena | 1 |
| Migueliz | 30 |
| Milton | 1 |
| Millo | 1 |
| Mina | 6 |
| Minguez | 2 |
| Minguiz | 1 |
| Miquele | 1 |
| Miqueleiz | 2 |
| Miralles | 1 |
| Miramonte | 2 |
| Miranda | 105 |
| Mirizaldu | 4 |
| Misericordia | 1 |
| Moga | 2 |
| Mojon | 10 |
| Moles | 2 |
| Molina | 2 |
| Molinero | 1 |
| Moncayola | 23 |
| Monchon | 1 |
| Monel | 1 |
| Moneu | 1 |
| Moneva | 5 |
| Mongelos | 34 |
| Monreal | 34 |
| Montaño | 1 |
| Montero | 10 |
| Montes | 1 |
| Montori | 27 |
| Montoya | 4 |
| Monzon | 1 |
| Mora | 1 |
| Morales | 4 |
| Morea | 2 |
| Moreno | 65 |
| Moreo | 24 |
| Moreu | 19 |
| Moriones | 75 |
| Mues | 1 |
| Mugueta | 28 |
| Munarriz | 3 |
| Muniain | 51 |
| Muñoz | 3 |
| Muntaño | 1 |
| Munuce | 2 |
| Mur | 2 |
| Murguia | 1 |
| Murguitio | 2 |
| Muriel | 12 |
| Murillo | 237 |
| Muriones | 5 |
| Muro | 5 |
| Muruzabal | 2 |
| Mutiloa | 1 |
