| Name | Meaning | Gender | Origin |
|---|
| Nutta | | Male | |
| Odin | Viking mythology: the allmighty god | Male | Old |
| Oj | Short for orange juice. | Male | |
| 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 |
| Omayda | Beautiful and sweet
| Female | |
| Opie | | Unisex | |
| Opus | | Male | Hebrew |
| Orange | Round citrus fruit originating in Southeast Asia. | Female | Fruit |
| Orange | Round citrus fruit originating in Southeast Asia. | Female | Fruit |
| Orange Blossom | | Unisex | Hebrew |
| Orange Crush | | Unisex | |
| Orange Juice | | Unisex | |
| Orbit | | Male | Hebrew |
| Orquidea | Orchid
| Female | |
| Oscar | God's spear.
| Male | English |
| Otto Bagman | Ludo's brother.
| Male | |
| Pablo | Little. Form of Paul.
| Male | Spanish |
| Paddy | Latin, noble, patrician | Male | Irish |
| Paisley | church, cemetery | Female | Scottish |
| Paloma | Dove
| Female | Spanish |
| Paprika | Spicy powder made from sweet red peppers. | Unisex | |
| Particle | | Unisex | |
| Paws | | Male | |
| Peach | | Unisex | |
| Peaches | Red, yellow skinned fleshy fruit | Female | English |