| Name | Meaning | Gender | Origin |
|---|
| Nugget | as in Chicken | Unisex | |
| Nutmeg | | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oscar | God's spear.
| Male | English |
| Oskar | English, God's spear, Irish, deer-lover or champion warrior | Male | |
| Ostara | | Unisex | |
| Oz | strength | Male | Hebrew |
| Ozzie | Strong
| Male | Short |
| Ozzy | From Osbert - Divinely bright warrior. | Male | |
| Patch | A pad or shield worn over one eye. | Male | |
| Patches | | Male | |
| Pebbles | after the character in 'The Flintstones' cartoons | Male | |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Pluto | The ninth and most distant planet from the sun | Male | |
| Pogo | | Unisex | |
| Polo | brave wanderer | Male | Tibetan |
| Polo | brave wanderer | Male | Tibetan |
| Possum | Nocturnal marsupial with a thick coat of hair, long nose and long tail | Male | |
| Prince | Principal one: first. The rock musician Prince.
| Male | Latin |
| Pumpkin | Large round fruit with orange skin | Male | |
| Puss | | Male | |
| Puss Puss | | Unisex | |
| Pussy | | Unisex | |
| Ralph | Red wolf
| Male | English |