| Name | Meaning | Gender | Origin |
|---|
| Newt | a small salamander | Male | English |
| Nibbles | | Unisex | |
| Nietzsche | | Unisex | Hebrew |
| Niko | victory of the people | Male | Greek |
| Nugget | as in Chicken | Unisex | |
| Nutmeg | | Male | |
| Obie | O.B. | 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 |
| Onassis | | Male | Hebrew |
| 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 |
| Osiris | with strong eyesight | Male | Egyptian |
| Othello | he has the sound of God | Male | Hebrew |
| Ozone | | Male | Hebrew |
| Ozzy | From Osbert - Divinely bright warrior. | Male | |
| Pancho | Nickname for Francisco and Frank.
| Male | Spanish |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Male | |
| Patches | | Male | |
| Peace | Peaceful
| Male | Word |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | |
| Pegasus | | Male | |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Pester | | Male | Hebrew |
| Phantom | Something elusive. A ghost | Unisex | |