| Name | Meaning | Gender | Origin |
|---|
| Marie Curie | | Unisex | Hebrew |
| Mario | bitter, king-ruler | Male | Italian |
| Mark | warlike | Male | Latin |
| Marlowe | after Philip | Male | English |
| Mars | God Of War | Male | Latin |
| Marshall | Man who looks after a nobleman's estate, keeper of the horses; steward | Male | |
| Martin | Warlike person. | Male | Latin |
| Marvin | beautiful sea; good friend | Male | Welsh |
| Matilda | battle-mighty | Female | |
| Matthew | Gift of the Lord | Male | Hebrew |
| Maude | battle-mighty | Female | English |
| Maximilian | greatest | Male | Latin |
| Maxwell | Capable
| Male | Scottish |
| Maynard | Firm
| Male | |
| Medea | ruling; middle child | Female | Greek |
| Megabyte | | Unisex | Hebrew |
| Melinda | Blend of Melissa and Linda.
| Female | English |
| Melville | hillside; town by the mill | Male | Scottish |
| Melvin | Chief
| Male | English |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Mervyn | Famous Friend | Male | English |
| Michael | who is like God | Male | Hebrew |
| Michelle | Feminine of Michael | Female | |
| Mika | Abbreviation of Michaela:Micaela: Mikaela: Mikayla: Mychaela: Mikella. Feminine of Michael gift from God.
| Female | Japanese |
| Milhouse | | Unisex | Hebrew |