| Name | Meaning | Gender | Origin |
|---|
| Olaf | ancestor's relic | Male | Norse |
| Otis | Wealthy.
| Male | |
| Paws | | Male | |
| Penn | enclosure | Male | English |
| Pierce | rock | Male | English |
| Pierce | rock | Unisex | |
| Pounce | | Unisex | |
| Princeton | Principal one: first. The rock musician Prince.
| Male | English |
| Prowler | | Unisex | |
| Quincy | Fifth: derived from Roman clan name.
| Male | |
| Randolph | shield-wolf | Male | English |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rhett | Enthusiastic, stream.
| Male | English |
| Rocky | rest | Male | English |
| Rowan | red-haired; rugged | Male | Scottish |
| Rowdy | A rough disorderly person. | Male | American |
| Rufus | Red haired | Male | Latin |
| Samuel | his name is God | Male | Hebrew |
| Scottie | | Unisex | |
| Scratch | | Unisex | |
| Simon | he who hears | Male | Hebrew |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |