| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Marcela | Spanish | Warring. | F | |
| 522 | Margarita | Spanish | Pearl. | F | |
| 523 | Maria | Spanish | Bitter. | F | |
| 524 | Mariabella | Spanish | Beautiful Mary. | F | |
| 525 | Maricel | Spanish | Variant of Marcella: of Mars. Mars was the mythological Roman god of fertility for whom the month March was named; mythologically identified with the Greek war god Ares. | F | |
| 526 | Maricela | Spanish | Variant of Marcella: of Mars. Mars was the mythological Roman god of fertility for whom the month March was named; mythologically identified with the Greek war god Ares. | F | |
| 527 | Maricelia | Spanish | Variant of Marcella: of Mars. Mars was the mythological Roman god of fertility for whom the month March was named; mythologically identified with the Greek war god Ares. | F | |
| 528 | Maricella | Spanish | Variant of Marcella: of Mars. Mars was the mythological Roman god of fertility for whom the month March was named; mythologically identified with the Greek war god Ares. | F | |
| 529 | Marietta | Spanish | Bitter. | F | |
| 530 | Mariquita | Spanish | Bitter. | F | |
| 531 | Marisa | Spanish | Bitter. | F | |
| 532 | Marisela | Spanish | Variant of Marcella: of Mars. Mars was the mythological Roman god of fertility for whom the month March was named; mythologically identified with the Greek war god Ares. | F | |
| 533 | Marisol | Spanish | Bitter. | F | |
| 534 | Marquilla | Spanish | Bitter. | F | |
| 535 | Marta | Spanish | Spanish form of Martha: lady. | F | |
| 536 | Martina | Spanish | Feminine of Martin: warring. | F | |
| 537 | Maya | Spanish | Abbreviation of Amalia; variant of Maia. | F | |
| 538 | Melisandra | Spanish | Strength; determination. | F | |
| 539 | Melisenda | Spanish | Sweet. | F | |
| 540 | Melita | Spanish | Abbreviation of Carmelita. | F | |