| Name | Meaning | Gender | Origin |
|---|
| Noelle | Day of birth | Unisex | Latin |
| Noi | | Male | Hebrew |
| Norman | Thor mind, Thor courage | Male | Gaelic |
| Norton | North settlement, north enclosure | Male | English |
| Nutmeg | | Unisex | Hebrew |
| Oakley | From the oak meadow | Male | English |
| Oberon | Noble bear | Unisex | German |
| Obsidian | | Unisex | Hebrew |
| Odie | Woad hill | Unisex | English |
| Odysseus | Full of wrath | Male | Greek |
| Olaf | Ancestor | Male | Norse |
| Oliver | Elf army | Male | French |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Orion | Son Of Fire | Male | Greek |
| Orlando | Famous country | Male | Germanic |
| Oscar | Divine spear | Male | English |
| Osiris | Uncertain, perhaps throne of the eye | Unisex | Ancient Egyptian |
| Othello | Wealth | Male | German |
| Otis | One who hears well | Male | Greek |
| Ovid | Sheep | Male | Latin |
| Oz | Divine | Male | English |
| Pacey | Paccius' place | Unisex | French |
| Palmer | Pilgrim | Male | English |
| Pancho | From France | Male | Latin |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Panther | A black leopard | Unisex | English |
| Parker | Gamekeeper of a park | Male | English |
| Pascal | Relating to Easter | Male | Latin |
| Pasha | Passover | Unisex | Greek |