| Name | Meaning | Gender | Origin |
|---|
| Matilde | Powerful battler | Female | German |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maxine | Little Maximus | Female | Latin |
| Maxwell | Maccus's stream | Male | English |
| Mel | Uncertain, possibly bad town | Unisex | English |
| Mercedes | Mercies | Female | Spanish |
| Mercy | Compassion | Female | English |
| Merlin | Sea fort | Male | Welsh |
| Micaela | Who is like God? | Female | Hebrew |
| Milo | Uncertain, perhaps peaceful | Male | Germanic |
| Misty | Misty | Female | English |
| Monica | Uncertain, perhaps counsellor | Female | Latin |
| Monster | A creature of frightening appearance | Unisex | English |
| Moses | Drawn out of the water | Male | Hebrew |
| Murphy | Sea warrior | Male | Gaelic |
| Natalia | Christ's birthday | Female | Italian |
| Nathalia | (Christ's) birthday | Female | Latin |
| Nero | Stern | Male | Latin |
| Nevada | Snow-covered | Female | Spanish |
| Olaf | Ancestor | Male | Norse |
| Olga | Holy | Female | German |
| Olivia | Elf army | Female | English |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Opal | Jewel, gem | Female | Sanskrit |
| Oscar | Divine spear | Male | English |
| Otis | One who hears well | Male | Greek |
| Otto | Wealth | Male | German |
| Oxford | From The Ox Ford | Male | English |
| Patricia | A patrician | Female | Latin |
| Paula | Small | Female | Latin |