| Name | Meaning | Gender | Origin |
|---|
| Meaghan | Pearl | Unisex | English |
| Meggie | Pearl | Unisex | English |
| Meghann | Pearl | Unisex | Greek |
| Mercury | Trade God | Male | Latin |
| Meta | Ambitious | Unisex | Latin |
| Mica | Humble | Unisex | Hebrew |
| Micah | who is like the Lord | Male | Hebrew |
| Miller | one who mills. Brand of American beer | Male | English |
| Monte | Powerful Mountain | Male | English |
| Moonstone | | Unisex | |
| Nelly | Abbreviation of Eleanor shining light.
| Male | English |
| Neptune | | Male | |
| Nickel | | Unisex | Hebrew |
| Noire | | Unisex | |
| Norbert | blond hero | Male | |
| Obsidian | | Unisex | |
| 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 |
| Onyx | A gemstone with bands of different colours. | Male | |
| Opaline | Precious Jewel | Unisex | English |
| Osborn | Soldier of God | Male | English |
| Padme | | Unisex | Hebrew |
| Pebbles | after the character in 'The Flintstones' cartoons | Male | |
| Pedro | A Rock | Male | Spanish |
| Peggie | | Unisex | |
| Pere | Rock | Unisex | Catalan |