| Name | Meaning | Gender | Origin |
|---|
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Percy | | Male | |
| Perdita | lost | Female | Latin |
| Petey | | Male | |
| Petunia | trumpet-shaped flower | Female | English |
| Pluto | The ninth and most distant planet from the sun | Male | |
| Prince | Principal one: first. The rock musician Prince.
| Male | Latin |
| Princess | Female member of a royal family | Female | Word |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rocky | rest | Male | English |
| Rosco | | Unisex | |
| Rose | Flower
| Female | Latin |
| Rosebud | | Unisex | Hebrew |
| Rosie | From Rose - The most beautiful of flowers | Female | English |
| Rover | A wanderer | Unisex | |
| Roxy | From Roxanne - Brilliant dawn | Female | English |
| Rufus | Red haired | Male | Latin |
| Sabine | Of Sabine, Italy | Unisex | French |
| Sadie | Princess
| Female | English |
| Sallie | Princess | Unisex | English |
| Sally | saviour | Female | English |
| Samson | Bright sun
| Male | Hebrew |
| Sasha | defending men | Female | Russian |
| Scarlett | Red | Female | English |
| Scout | One dispatched from main body to gather information | Male | Word |