| Name | Meaning | Gender | Origin |
|---|
| Marika | Bitter | Female | Czechoslovakian |
| Marjoram | An aromatic herb of the mint family. | Unisex | |
| Mayo | yew-tree plain | Male | Irish |
| Miki | beautiful tree | Female | Japanese |
| Mikki | Who Is Like G-D | Female | Hebrew |
| Mimosa | | Female | |
| Mina | Precious Stone | Female | Hindi |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Nash | cliff | Male | English |
| Nelda | one who lives by the alder tree | Female | English |
| Nellie | the bright one | Female | English |
| Ngaio | after New Zealand mystery writer Ngaio Marsh | Female | Maori |
| Nick | Variation of Dominic, belonging to the Lord | Male | English |
| Nikki | Victorious People | Unisex | English |
| Nutmeg | | Male | |
| Oakes | from the oak-tree grove | Male | English |
| Oakley | from the oak meadow | Male | English |
| Ogden | from the oak valley | Male | English |
| Oleander | | Unisex | |
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| 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 |
| Olivette | Olive tree | Unisex | English |
| Olivia | Olive
| Female | Latin |
| Olivier | From the olive tree
| Male | |
| Ollie | Latin, olive tree | Male | English |