| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Marquinhos | - | Portuguese | ||
| Marta | MAHR-tah (Spanish, Italian, Polish, Czech) | Spanish, Italian, Portuguese, Catalan, Polish, Czech, Slovak, German, Dutch, Romanian, Slovene, Bulg | ||
| Martim | - | Portuguese | ||
| Martinho | - | Portuguese | ||
| Masami | mah-sah-mee | Japanese | ||
| Masaru | mah-sah-ṙoo | Japanese | ||
| Masuyo | mah-soo-yo | Japanese | ||
| Mateus | - | Portuguese | ||
| Matheus | - | Portuguese (Brazilian) | ||
| Matias | MAH-tee-ahs (Finnish) | Finnish, Portuguese | ||
| Matilde | mah-TEEL-de (Spanish) | Spanish, Portuguese, Italian | ||
| Maui | - | Hawaiian, Polynesian Mythology | ||
| MaurÍCio | mow-REE-syoo | Portuguese | ||
| Mauro | MOW-ro (Italian) | Italian, Portuguese (Brazilian) | ||
| Mawar | - | Indonesian, Malay |