| Name | Meaning | Gender | Origin |
|---|
| Mo | Moor | Unisex | Latin |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Murphy | Sea warrior | Male | Gaelic |
| Nelson | Son of Neal | Male | English |
| Nemo | No one | Male | Latin |
| Neptune | God of the sea | Unisex | Latin |
| Nipper | A small boy | Unisex | English |
| Noah | Rest | Male | Hebrew |
| Norton | North settlement, north enclosure | Male | English |
| Nutmeg | | Unisex | Hebrew |
| Oli | Olive Tree | Unisex | English |
| Oliver | Elf army | Male | French |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Oscar | Divine spear | Male | English |
| Paco | From France | Male | Latin |
| Paws | | Unisex | Hebrew |
| Pax | Peace | Unisex | Latin |
| Percy | Pierce valley | Male | French |
| Phoenix | Phoenix | Male | Greek |
| Pluto | Wealth, riches | Unisex | Greek |
| Prince | Royal son | Male | English |
| Rags | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rich | Well built, hardy | Male | French |
| Riley | Rye clearing | Male | English |
| Rio | River | Male | Spanish |
| Rocky | Battle cry | Male | Germanic |
| Rogue | | Unisex | Hebrew |
| Romeo | Pilgrim to Rome | Male | Italian |
| Romy | Sea dew | Unisex | Latin |