| Name | Meaning | Gender | Origin |
|---|
| Mindy | Pet form of Melinda | Female | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moony | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Moya | Exceptional | Female | English |
| Munchkin | A very small elflike person. | Unisex | English |
| Myrtle | Myrtle | Female | English |
| Nicola | Victory of the people | Female | Greek |
| Nina | Strong | Female | Latin |
| Norris | Northener | Unisex | French |
| Obie | O.B. | Unisex | English |
| Odie | Woad hill | Unisex | English |
| Oona | One | Female | Latin |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Padfoot | | Unisex | Hebrew |
| Paige | Page | Female | English |
| Pauline | Small | Female | Latin |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Peewee | | Unisex | Hebrew |
| Penny | Weaver | Female | Greek |
| Pepper | Pepper | Female | English |
| Petunia | Type of flower | Female | English |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |