| Name | Meaning | Gender | Origin |
|---|
| Marguerite | Pearl | Female | Greek |
| Marina | From the god Mars | Female | Latin |
| Marjani | Coral | Female | Swahili |
| Marjeta | Pearl | Female | English |
| Marjorie | Pearl | Female | Greek |
| Mary | Bitter | Female | Hebrew |
| Mattie | Powerful battler | Female | German |
| Mauve | | Female | Hebrew |
| May | The fifth month of the year | Female | English |
| Mayra | Uncertain, perhaps myrrh, onguent | Female | Latin |
| Meagan | Pearl | Female | Greek |
| Meaghan | Pearl | Female | Greek |
| Meg | Pearl | Female | Greek |
| Megan | Pearl | Female | Greek |
| Meghan | Pearl | Female | Greek |
| Mei | The youngest of sisters | Female | Chinese |
| Melanie | Black | Female | Greek |
| Meta | Ambitious | Female | Latin |
| Mildred | Gentle strength | Female | English |
| Millie | Labour | Female | Germanic |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Mona | Little noble one | Female | Gaelic |
| Neelam | Blue sapphire | Female | Persian |
| Neptune | God of the sea | Unisex | Latin |
| Niobe | Fern | Female | Greek |
| Obsidian | | Unisex | Hebrew |
| Olive | Olive | Female | English |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Opal | Jewel, gem | Female | Sanskrit |