| Name | Meaning | Gender | Origin |
|---|
| Obie | O.B. | Unisex | English |
| Oscar | Divine spear | Male | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Piston | | Unisex | Hebrew |
| Polo | Brave wanderer | Male | English |
| Pringle | | Unisex | Hebrew |
| Quinn | Descendent of Cuinn | Male | Gaelic |
| Rex | King | Male | Latin |
| Richard | Strong power | Male | French |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rocky | Battle cry | Male | Germanic |
| Rogue | | Unisex | Hebrew |
| Roman | Roman | Unisex | Latin |
| Rufus | Red | Male | Latin |
| Runako | Handsome | Male | African |
| Sable | Sable (black) | Unisex | English |
| Sabre | | Unisex | Hebrew |
| Safari | | Unisex | Hebrew |
| Sampson | Sun | Unisex | Hebrew |
| Samson | Sun | Male | Hebrew |
| Sasha | Defending men | Unisex | Greek |
| Sasquatch | Has extra toes and hence is a bigfoot | Unisex | English |
| Sassy | Lively and spirited | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Scar | From The Lion King | Unisex | English |
| Scooter | One who goes suddenly and speedily. | Unisex | English |
| Scout | Observer | Unisex | American English |
| Shark | | Unisex | Hebrew |