| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Sybille | see-BI-lə (German) | German, French | ||
| Sylvain | seel-VEN | French | ||
| Sylvaine | seel-VEN | French | ||
| Sylvestre | - | French | ||
| Sylviane | - | French | ||
| Sylvianne | - | French | ||
| Sylvie | seel-VEE | French | ||
| TÉLesphore | - | French | ||
| Tatienne | - | French | ||
| ThÉO | te-O | French | ||
| ThÉOdore | te-o-DOR | French | ||
| ThÉOphile | te-o-FEEL | French | ||
| ThÉOtime | te-o-TEEM | French | ||
| ThÉRÈSe | te-REZ | French | ||
| Theirn | - | French |