| Name | Meaning | Gender | Origin |
|---|
| Orson | Little bear
| Male | Latin |
| Oscar | God's spear.
| Male | English |
| Owen | Young fighter
| Male | Welsh |
| Parker | cultivated land | Male | English |
| Patrick | Patrician: noble. Romans society was divided into plebeians: (commoners) and patricians: (aristocrats). Saint Patrick - patron saint of Ireland.
| Male | Latin |
| Percival | Hero of several Arthurian stories
| Male | |
| Peregrine | traveler, pilgrim | Male | Latin |
| Phillip | lover of horses | Male | Greek |
| Phineas | oracle; dark-skinned | Male | Hebrew |
| Pierce | rock | Unisex | |
| Pierce | rock | Male | English |
| Quentin | Fifth.
| Male | Latin |
| Quincy | Fifth: derived from Roman clan name.
| Male | |
| Raoul | Form of Ralph wolf counsel.
| Male | |
| Raymond | Guards wisely.
| Male | |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rhys | ardor | Male | Welsh |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Rochester | rock fortress | Male | English |
| Roman | citizen of Rome | Male | Latin |
| Ronan | a pledge | Male | Irish |
| Ross | from the TV sitcom Friends | Male | Scottish |
| Russell | Red as a fox. | Male | |
| Samuel | his name is God | Male | Hebrew |
| Scott | from Scotland | Male | English |