| Name | Meaning | Gender | Origin |
|---|
| 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 |
| Olivia | Olive
| Female | Latin |
| Oprah | Fawn | Female | 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 | |
| Orlando | Famous land
| Male | Italian |
| Orson | Little bear
| Male | Latin |
| Palmer | palm bearing pilgrim | Male | English |
| Patches | | Male | |
| Patton | fighter's town | Male | English |
| Pele | Hawaiian volcano goddess. | Female | Hawaiian |
| Pesto | | Male | |
| Pie | A baked pastry filled with fruit or meat. | Unisex | |
| Poe | peacock | Male | |
| Pollock | pit | Male | Scottish |
| Princess | Female member of a royal family | Female | Word |
| Pumpkin | Large round fruit with orange skin | Male | |
| Radar | | Male | |
| Rafa | happiness, prosperity | Female | Arabic |
| Raleigh | dweller by the deer meadow | Male | English |
| Ralph | Red wolf
| Male | English |
| Ralph | Red wolf
| Male | English |
| Rance | a kind of Belgian marble | Unisex | |
| Ranger | dweller in the field A warden employed to protect a forest area. | Male | |
| Rebel | One that resists of defies authority | Male | Word |