| Name | Meaning | Gender | Origin |
|---|
| Ray | kingly | Male | English |
| Rebel | One that resists of defies authority | Male | Word |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rhys | ardor | Male | Welsh |
| River | | Male | |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Rocco | rest | Male | Italian |
| Rocket | To move swiftly and powerfully | Male | Word |
| Rocko | | Male | |
| Rocky | rest | Male | English |
| Rogue | | Male | |
| Roman | citizen of Rome | Male | Latin |
| Romeo | pilgrim to Rome | Male | Italian |
| Ronan | a pledge | Male | Irish |
| Rowan | red-haired; rugged | Male | Scottish |
| Royal | kingly, royal | Male | |
| Rufus | Red haired | Male | Latin |
| Russell | Red as a fox. | Male | |
| Ryder | cavalryman, messenger | Male | British |
| Sailor | One who serves in the navy or works on a ship. | Male | Occupational |
| Sam | to hear | Male | English |
| Samuel | his name is God | Male | Hebrew |
| Sascha | defending warrior | Male | |
| Sawyer | woodsman | Male | English |
| Scout | One dispatched from main body to gather information | Male | Word |