| Sylvestra | Woman | English Names |
| Sylvia | Woman | Latin Names |
| Sylvie | Woman | French Names |
| Sylvius | Man | Latin Names |
| Symber | Woman | American Names |
| Symera | Woman | American Names |
| Symona | Woman | American Names |
| Symphony | Unisex | English Names |
| Synclair | Man | English Names |
| Synnøve | Woman | Scandinavian Names |
| Synova | Woman | Scandinavian Names |
| Syona | Woman | Indian Names |
| Syreeta | Woman | Indian Names |
| Syrita | Woman | American Names |
| Syshe | Unisex | Hebrew Names |