| Name | Meaning | Gender | Origin |
|---|
| Lucky | Having good luck. | Male | Word |
| M.C. | Mother Cat | Unisex | |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Marco Polo | | Unisex | |
| Margarita | Cocktail made with tequila and lemon or lime juice. | Female | Spanish |
| Maybe | | Unisex | |
| Mo | bitter | Female | English |
| Mooch | | Unisex | |
| Mork | From Mork and Mindy.
| Male | |
| Moses | saved; child; taken from water | Male | Egyptian |
| Newton | new town | Male | English |
| Night | | Male | |
| Nomad | One who roams, a wanderer. | Unisex | |
| Nona | ninth | Female | Latin |
| Nuisance | | Male | Hebrew |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Omi | | Unisex | Hebrew |
| Oops | | Unisex | |
| Orphan | | Unisex | |
| Orphan Annie | | Unisex | Hebrew |
| Oscar | God's spear.
| Male | English |
| P.C. | Picky Cat | Unisex | |
| Panther | A black leopard | Male | |
| Percy | | Male | |