| Silvanus | | sil-VAY-nəs (English) | Roman Mythology, Ancient Roman, Biblical, Biblical Latin | |
| Simonides | | - | Ancient Greek | |
| Sindri | | - | Norse Mythology, Ancient Scandinavian, Icelandic | |
| Siward | | - | Ancient Germanic | |
| SluaghadhÁN | | - | Ancient Irish | |
| Snorri | | - | Ancient Scandinavian, Icelandic | |
| Socrates | | SAHK-rə-teez (English) | Ancient Greek (Latinized) | |
| Sokrates | | - | Ancient Greek | |
| Solon | | - | Ancient Greek | |
| Somarli&Eth;R | | - | Ancient Scandinavian | |
| Sophia | | so-FEE-ə (English), so-FIE-ə (British English), zo-FEE-ah (German) | English, Greek, German, Ancient Greek | |
| Sophocles | | SAHF-u-kleez (English) | Ancient Greek (Latinized) | |
| Sophokles | | - | Ancient Greek | |
| Sophos | | - | Ancient Greek | |
| Sophus | | - | Ancient Greek (Latinized) | |