| Name | Meaning | Gender | Origin |
|---|
| Mitzi | bitter | Female | |
| Mojo | Good luck charm. | Unisex | |
| Mommy | | Unisex | |
| Monday | Moon day | Female | English |
| Mongo | after a character in the movie Blazing Saddles | Male | Yoruba |
| Monster | A creature of frightening appearance | Unisex | |
| Montana | Mountain. | Male | Spanish |
| Moo | | Unisex | |
| Moo | | Unisex | |
| Moon | Moon | Female | American |
| Moonstone | | Unisex | |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |
| Motor | | Male | |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | |
| Moxi | | Unisex | Hebrew |
| Mr. | | Unisex | |
| Muffin | A small cup shaped cake | Unisex | |
| Mya | Mine | Female | Latin |
| Myles | inventor of the corn mill | Male | English |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Nadia | hope | Female | Russian |
| Nala | African for love, after the character in the Lion King movies | Female | African |
| Nana | A grandmother. | Female | English |
| Napoleon | Hound Dog from the AristoCats
| Male | Greek |
| Ned | wealthy guardian | Male | English |