| Name | Meaning | Gender | Origin |
|---|
| Pluto | Wealth, riches | Unisex | Greek |
| Pogo | | Unisex | Hebrew |
| Pretzel | Glazed, salted and brittle biscuit in the form of a knot or stick. | Unisex | English |
| Prince | Royal son | Male | English |
| Radar | | Unisex | Hebrew |
| Ralph | Wolf council | Male | Germanic |
| Rambo | | Unisex | Hebrew |
| Ramses | Son of Ra | Male | Ancient Egyptian |
| Ranger | Gamekeeper | Male | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Raymond | Advice | Male | Germanic |
| Rebel | One that resists of defies authority | Unisex | English |
| Reginald | Ruler with counsel | Male | Germanic |
| Remington | Settlement on the boundary stream | Male | English |
| Reuben | Behold, a son | Male | Hebrew |
| Rex | King | Male | Latin |
| Rhys | Enthusiasm | Unisex | Welsh |
| Rich | Well built, hardy | Male | French |
| Richard | Strong power | Male | French |
| Ricky | Strong power | Male | French |
| Ringo | Apple, peace be with you | Male | English |
| Rio | River | Male | Spanish |
| Ripley | Separate | Male | English |
| Rob | Bright fame | Male | Germanic |
| Robert | Bright fame | Male | Germanic |
| Rock | Stone | Male | English |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rocky | Battle cry | Male | Germanic |
| Roderick | Famous ruler | Male | Germanic |
| Rodger | Famous spear | Unisex | English |