| Name | Meaning | Gender | Origin |
|---|
| Oli | Olive Tree | Unisex | English |
| Olier | | Male | Hebrew |
| Oliver | Elf army | Male | French |
| Osiris | Uncertain, perhaps throne of the eye | Unisex | Ancient Egyptian |
| Perky | | Unisex | Hebrew |
| Ptolemy | Warlike | Male | Greek |
| Pug | Short for pugnacious; combative, belligerent. A breed of dog originating in China. | Unisex | English |
| Ragnar | Strong army | Male | Norwegian |
| Raider | | Unisex | Hebrew |
| Rainer | Wise army | Male | Germanic |
| Rainier | Wise army | Male | Germanic |
| Rambo | | Unisex | Hebrew |
| Ranjeet | Coloured, painted | Male | Sanskrit |
| Rebel | One that resists of defies authority | Unisex | English |
| Remington | Settlement on the boundary stream | Male | English |
| Rex | King | Male | Latin |
| Rocky | Battle cry | Male | Germanic |
| Rogue | | Unisex | Hebrew |
| Rowdy | Boisterous. Western Nickname. | Unisex | English |
| Royce | Rose | Male | Latin |
| Ruckus | | Unisex | Hebrew |
| Ryder | One who rides | Unisex | English |
| Saber | Patient | Male | English |
| Sabre | | Unisex | Hebrew |
| Sailor | Sailor | Unisex | English |
| Shiva | Auspicious | Unisex | Sanskrit |
| Snap | | Unisex | Hebrew |
| Spartacus | From the city of Sparta | Unisex | English |
| Spunky | Spirited, plucky. | Unisex | English |
| Sterling | Little star - stellar | Male | English |