| Baby Name | Meaning | Gender |
|---|
| Nyx | Night | Female |
| Oba | King | Male |
| Odelia | "Little, Wealthy One." Some Variants Are Odelina, Odelinda, Odella, Odelyn, Odelyna, Odette, Odilia, Otha, Othilia, And Ottilie. | Female |
| Odin | Wealthy Defender | Male |
| Oksana | | Female |
| Olympia | From Olympus | Female |
| Osborn | Divine Warrior | Male |
| Osmond | Divine Protector | Male |
| Oswald | Power Of God | Male |
| Oya | Miwok Name.Meaning Unknown | Male |
| Ozzie | Strong | Male |
| Padma | Lotus | Female |
| Pandora | Myth Name (Released Misery And Hope Into The World) | Female |
| Panthea | All The Gods | Female |
| Parthenia | Chaste | Female |
| Penelope | Myth Name (Faithful Wife Of Odysseus) | Female |
| Peony | Flower | Female |
| Persephone | Myth Name (Wife Of Hades) | Female |
| Phoebe | Myth Name (Mother Of Leto) | Female |
| Plutus | Myth Name (Wealth) | Male |
| Pontus | Sea | Male |
| Poseidon | Myth Name (God Of The Sea And Ocean) | Male |
| Priapus | Myth Name (God Of Fertility) | Male |
| Proteus | Myth Name (A Sea God) | Male |
| Psyche | Myth Name (Lover Of Cupid) | Female |