| Marcelinho | | - | Portuguese | |
| Marcelino | | mahr-the-LEE-no (Spanish), mahr-se-LEE-no (Latin American Spanish) | Spanish, Portuguese | |
| Marcelo | | mahr-THE-lo (Spanish), mahr-SE-lo (Latin American Spanish) | Spanish, Portuguese | |
| Marciana | | - | Ancient Roman, Portuguese (Brazilian) | |
| Marciane | | - | Portuguese (Brazilian) | |
| Marciano | | - | Portuguese, Spanish, Italian | |
| Marco | | MAHR-ko (Italian, Spanish, Dutch) | Italian, Spanish, Portuguese, German, Dutch | |
| Marcos | | MAHR-kos (Spanish), MAR-koos (Portuguese) | Spanish, Portuguese | |
| Margarida | | mar-ga-REE-də (Portuguese) | Portuguese, Galician, Catalan, Occitan | |
| Maria | | mah-REE-ah (Italian, German, Swedish, Norwegian, Danish, Dutch), mə-REE-ə (Catalan, English), MAHR-yah (Polish), MAH-ree-ah (Finnish) | Italian, Portuguese, Catalan, Occitan, German, Swedish, Norwegian, Danish, Faroese, Dutch, Frisian, | |
| Mariana | | mə-RYA-nə (Portuguese), mah-RYAH-nah (Spanish) | Portuguese, Spanish, Romanian, Czech, Ancient Roman | |
| Mariano | | - | Italian, Spanish, Portuguese | |
| Mariazinha | | - | Portuguese | |
| Marina | | mah-REE-nah (Italian, Spanish, German, Russian), mə-REEN-ə (English) | Italian, Spanish, Portuguese, German, Swedish, Norwegian, Danish, Dutch, English, Greek, Russian, Uk | |
| Marinho | | - | Portuguese | |