| Name | Meaning | Gender | Origin |
|---|
| Ninja | | Unisex | Hebrew |
| Nipper | A small boy | Unisex | English |
| Nova | New | Female | Latin |
| Nyla | Cloud or champion | Female | Gaelic |
| Odette | Wealth | Female | Germanic |
| Olga | Holy | Female | German |
| Olivia | Elf army | Female | English |
| Omega | Great | Female | English |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Opal | Jewel, gem | Female | Sanskrit |
| Ophelia | Help | Female | Greek |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Pace | Peace | Unisex | English |
| Paisley | Church, cemetery | Unisex | English |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Panther | A black leopard | Unisex | English |
| Pasha | Passover | Unisex | Greek |
| Patches | | Unisex | Hebrew |
| Patricia | A patrician | Female | Latin |
| Paws | | Unisex | Hebrew |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pearl | Pearl | Female | English |
| Pebbles | After the character in 'The Flintstones' cartoons | Female | English |
| Peewee | | Unisex | Hebrew |
| Penelope | Weaver | Female | Greek |
| Penny | Weaver | Female | Greek |
| Pepe | He will enlarge | Unisex | Hebrew |
| Pepper | Pepper | Female | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |