| Name | Meaning | Gender | Origin |
|---|
| Nelly | Abbreviation of Eleanor shining light.
| Male | English |
| Nero | stern | Male | Latin |
| Orlando | Famous land
| Male | Italian |
| Orpheus | | Male | |
| Ory | | Unisex | |
| Oscar | God's spear.
| Male | English |
| Osman | Godly protection.
| Male | Arabic |
| Owen | Young fighter
| Male | Welsh |
| Paul | small | Male | Latin |
| Pedro | A Rock | Male | Spanish |
| Percival | Hero of several Arthurian stories
| Male | |
| Peter | A rock. Peter the biblical fisherman and apostle had impulsive nature and rocklike faith. In Catholic tradition he is the first pope.
| Male | Greek |
| Pollux | crown | Male | Greek |
| Ramiro | Judicious
| Male | Portuguese |
| Ramon | Form of Raymond Guards wisely.
| Male | Catalan |
| Raoul | Form of Ralph wolf counsel.
| Male | |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Rocco | rest | Male | Italian |
| Rodrigo | famous ruler | Male | Spanish |
| Roger | famous spearman, quiet | Male | |
| Romeo | pilgrim to Rome | Male | Italian |
| Ronaldo | Advisor, Ruler | Unisex | Portuguese |
| Rudolf | | Unisex | |
| Samson | Bright sun
| Male | Hebrew |