| Monserrat | Woman | Spanish Names |
| Montego | Man | Spanish Names |
| Montenegro | Man | Spanish Names |
| Montes | Unisex | Spanish Names |
| Montoya | Unisex | Spanish Names |
| Mora | Woman | Spanish Names |
| Morales | Unisex | Spanish Names |
| Moreno | Unisex | Spanish Names |
| Moya | Woman | Spanish Names |
| Muñoz | Man | Spanish Names |
| Murrillo | Unisex | Spanish Names |
| Naiara | Woman | Spanish Names |
| Napier | Man | Spanish Names |
| Narcisco | Man | Spanish Names |
| Nardo | Man | Spanish Names |
| Natal | Man | Spanish Names |
| Natividad | Unisex | Spanish Names |
| Navarro | Man | Spanish Names |
| Necia | Woman | Spanish Names |
| Nemesio | Man | Spanish Names |