| Surname | Mother Tongue | State Of Origin |
|---|---|---|
| Machado | (Christian) | |
| Maciel | (Christian) | |
| Madeira | (Christian) | |
| Madrid | (Christian) | |
| Marcelo | (Christian) | |
| Marques | (Christian) | |
| Martins | (Christian) | |
| Martires | (Christian) | |
| Mascarenhas | (Christian) | |
| Mathias | (Christian) | |
| Mazarello | (Christian) | |
| Mendes | (Christian) | |
| Mendonca, Mendonsa | (Christian) | |
| Menezes | (Christian) | |
| Mergulhao | (Christian) | |
| Mesquita | (Christian) | |
| Messias | (Christian) | |
| Miranda | (Christian) | |
| Moniz | (Christian) | |
| Monserrate | (Christian) | |
| Monteiro | (Christian) | |
| Moraes | (Christian) |