| Name | Meaning | Gender | Origin |
|---|
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rice | | Unisex | |
| Rima | White antelope
| Female | Arabic |
| River | | Male | |
| Ronan | a pledge | Male | Irish |
| Roscoe | From the deer forest. | Male | Norse |
| Rose | Flower
| Female | Latin |
| Rosemary | the rosemary plant | Female | Latin |
| Rowan | red-haired; rugged | Male | Scottish |
| Rue | Bitter, Medicinal Plant | Male | English |
| Saffron | A cooking spice | Female | Spice |
| Sage | Aromatic grayish-green herb. Wise or experienced person. | Female | |
| Sawyer | woodsman | Male | English |
| Scout | One dispatched from main body to gather information | Male | Word |
| Senna | brightness | Female | Botanical |
| Sequoia | sparrow | Female | Native |
| Shawnee | Southern People, Algonquin Tribe | Female | Native American |
| Shelby | From the manor house Willow farm. English surname used more for girls than boys given names.
| Female | English |
| Sherwood | Bright forest. | Male | English |
| Silvester | Forest | Unisex | English |
| Silvia | from the woods | Female | Latin |
| Skye | sky, sheltering | Female | Scottish |
| Soleil | sun | Female | |
| Sorrel | reddish brown | Male | Botanical |
| Sparrow | a bird | Female | Nature |