| MARCELO | | mahr-THE-lo (Spanish), mahr-SE-lo (Latin American Spanish) | Spanish, Portuguese | |
| MARCELYN | | - | English (Rare) | |
| MARCI | | MAHR-see | English | |
| Marcia | | ['ma:sjə] | | |
| MARCIA | | MAHR-shə (English), MAHR-see-ə (English), MAHR-thyah (Spanish), MAHR-syah (Latin American Spanish) | English, Spanish, Ancient Roman | |
| MARCIAL | | - | Spanish | |
| MARCIANA | | - | Ancient Roman, Portuguese (Brazilian) | |
| MARCIANE | | - | Portuguese (Brazilian) | |
| MARCIANO | | - | Portuguese, Spanish, Italian | |
| MARCIANUS | | - | Ancient Roman | |
| MARCIE | | MAHR-see | English | |
| MARCIN | | MAHR-cheen | Polish | |
| MARCIO | | MAHR-thyo (Spanish), MAHR-syo (Latin American Spanish) | Spanish | |
| MARCIUS | | - | Ancient Roman | |
| MARCO | | MAHR-ko (Italian, Spanish, Dutch) | Italian, Spanish, Portuguese, German, Dutch | |