| Sarra | | - | Biblical Greek, Biblical Latin, Old Church Slavic | |
| SaulĖ | | - | Lithuanian, Baltic Mythology | |
| Saulius | | - | Lithuanian | |
| SebestyÉN | | - | Hungarian | |
| Simon | | SIE-mən (English), see-MAWN (French), ZEE-mawn (German), SEE-mawn (Dutch) | English, French, Swedish, Norwegian, Danish, German, Dutch, Hungarian, Slovene, Romanian, Macedonian | |
| Simona | | - | Italian, Czech, Slovak, Romanian, Lithuanian, Slovene, Bulgarian, Macedonian | |
| Simonas | | - | Lithuanian | |
| Simonu | | - | Old Church Slavic | |
| SmiltĖ | | - | Lithuanian | |
| Sofija | | - | Serbian, Croatian, Macedonian, Lithuanian, Latvian | |
| Solveiga | | - | Latvian, Lithuanian | |
| Soma | | SO-maw | Hungarian | |
| Sonam | | - | Tibetan, Bhutanese, Indian, Hindi, Marathi | |
| Stanislovas | | - | Lithuanian | |
| StefÁNia | | - | Hungarian | |