| Name | Meaning | Favorites |
| Rosalia | Combination of Rose and Lily | |
| Rosalina | Rose | |
| Rufa | Red-Haired | |
| Rufina | Red-Haired | |
| Rufio | Red-Haired | |
| Rufo | Red-Haired | |
| Sancho | Holy | |
| Serena | Serene | |
| Serene | Calm or Peaceful | |
| Silvanos | Forest Dweller | |
| Silvester | Forest Dweller | |
| Silvia | Of the woods | |
| Silvio | From the forest | |
| Stephenson | Crown | |
| Stevan | Crown | |
| Steve | Crown | |
| Steven | Crown | |
| Stevenson | Crown | |
| Sylvester | From the forest, Woods | |
| Sylvestre | Of the forest | |
