| Name | Meaning | Gender | Origin |
|---|
| Reeses | | Unisex | |
| Rhiannon | divine queen | Female | Welsh |
| Ricky | dominant or peaceful ruler | Male | English |
| Ringo | apple, peace be with you | Male | English |
| River | | Male | |
| Romeo | pilgrim to Rome | Male | Italian |
| Rose | Flower
| Female | Latin |
| Rosie | From Rose - The most beautiful of flowers | Female | English |
| Rug | | Unisex | Hebrew |
| Sabina | Sabine | Female | Latin |
| Saki | Cape | Unisex | Japanese |
| Sally | saviour | Female | English |
| Sam | to hear | Male | English |
| Samantha | A listener | Female | Hebrew |
| Sammie | | Unisex | |
| Samson | Bright sun
| Male | Hebrew |
| Sara | Arabic form of Sarah
| Female | English |
| Sarge | Noncommissioned Army or Air Force rank | Male | |
| Sasquatch | has extra toes and hence is a bigfoot | Unisex | |
| Sassy | Lively and spirited | Female | |
| Scruffy | Shabby or untidy | Unisex | |
| Sebastian | An august person | Male | Latin |
| Sesame | Small flat seeds used as food or source of cooking oil. | Female | Word |
| Shadow | A rough, dark image cast by an object blocking the sun's rays | Female | English |
| Shaggy | Bushy and matted (hair), unkempt. | Unisex | |