| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 841 | Mariabella | Spanish | Beautiful Mary. | F | |
| 842 | Mariano | Spanish | Masculine form of Marie. | M | |
| 843 | 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 | |
| 844 | 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 | |
| 845 | 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 | |
| 846 | 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 | |
| 847 | Marietta | Spanish | Bitter. | F | |
| 848 | Mario | Spanish | Warring. | M | |
| 849 | Mariquita | Spanish | Bitter. | F | |
| 850 | Marisa | Spanish | Bitter. | F | |
| 851 | 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 | |
| 852 | Marisol | Spanish | Bitter. | F | |
| 853 | Marquez | Spanish | A title name ranking below duke and above earl. | M | |
| 854 | Marquilla | Spanish | Bitter. | F | |
| 855 | Marta | Spanish | Spanish form of Martha: lady. | F | |
| 856 | Martin | Spanish | Warring. | M | |
| 857 | Martina | Spanish | Feminine of Martin: warring. | F | |
| 858 | Martinez | Spanish | Warring. | M | |
| 859 | Martino | Spanish | Warring. | M | |
| 860 | Mateo | Spanish | God's gift. | M | |