| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Sosigenes | - | Ancient Greek | ||
| Sostrate | - | Ancient Greek | ||
| Spurius | SPUWR-i-uws | Ancient Roman | ||
| StÍGandr | - | Ancient Scandinavian | ||
| Steinarr | - | Ancient Scandinavian | ||
| Steinn | - | Ancient Scandinavian | ||
| Stephanos | - | Ancient Greek, Biblical Greek, Greek | ||
| Stigr | - | Ancient Scandinavian | ||
| Straton | - | Ancient Greek | ||
| Suibhne | SIV-na (Irish, Scottish) | Irish, Scottish, Ancient Irish | ||
| Svanhildr | - | Ancient Scandinavian, Norse Mythology | ||
| Svantepolk | - | Ancient Scandinavian | ||
| Sveinn | - | Ancient Scandinavian | ||
| Sverrir | - | Ancient Scandinavian, Icelandic | ||
| Swanahilda | - | Ancient Germanic |