| Slate | Man | American Names |
| Slater | Unisex | English Names |
| Sloan | Man | Irish Names |
| Slone | Man | Irish Names |
| Smadar | Woman | Hebrew Names |
| Smilla | Woman | Scandinavian Names |
| Smith | Man | English Names |
| Snana | Woman | Native American - Sioux Names |
| Sneha | Woman | Indian Names |
| Snow | Woman | English Names |
| Snowy | Unisex | English Names |
| Snyder | Man | English Names |
| Socorro | Woman | Spanish Names |
| Socrates | Man | Greek Names |
| Soctayvian | Man | American Names |
| Sofer | Man | Hebrew Names |
| Sofia | Woman | Spanish Names |
| Sofieke | Woman | Dutch Names |
| Sofonisba | Woman | Italian Names |
| Sofranór | Man | Spanish Names |