| Portuguese baby names begining from M |
| Marco |
 | Of Mars; the god of war. |
| Marcos |
 | Of Mars. The Roman fertility god Mars for whom March was named. |
| Marques |
 | Of Mars; the god of war. A title name ranking below duke and above earl. |
| Mateus |
 | Gift of God. |
| Maureo |
 | Dark-skinned; A Moor. |
| Mauricio |
 | Dark-skinned; A Moor. |
| Miguel |
 | Form of Michael 'Who is like God?'. |
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