Starting with letter S
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Sinclair | Scottish | Bright; clear. From Saint Clair sur Elle. Famous Bearer: writer Sinclair Lewis (1885-1951). | M | |
| 522 | Sinfiotli | Norse | Son of Siggeir. | M | |
| 523 | Sinjin | English | St. John. | M | |
| 524 | Sinon | Greek | Convinced the Trojans to pull the horse inside the city walls. | M | |
| 525 | Sion | Welsh | Welsh form of John 'God is gracious'. | M | |
| 526 | Sior | Welsh | Welsh form of George 'farmer'. | M | |
| 527 | Sippai | Biblical | Threshold, silver cup. | M | |
| 528 | Siraaj | Muslim | Variant of Siraj: Lamp. Light.. | M | |
| 529 | Sirhaan | Muslim | Variant of Sirhan: Wolf.. | M | |
| 530 | Sirhan | Muslim | Wolf.. | M | |
| 531 | Sisamai | Biblical | House, blindness. | M | |
| 532 | Sisera | Biblical | That sees a horse or a swallow. | M | |
| 533 | Sisyphus | Greek | Son of Aelous. | M | |
| 534 | Sisyphus | Latin | Son of Aeolus. | M | |
| 535 | Siward | Shakespearean | 'The Tragedy of Macbeth' Siward, Earl of Northumberland, general of the English forces. Also Young Siward, his son. | M | |
| 536 | Siwili | NativeAmerican | Tail of the fox. | M | |
| 537 | Sixtus | Latin | Bom sixth. | M | |
| 538 | Skagi | Norse | Son of Skopta. | M | |
| 539 | Skelton | English | From the estate on the ledge. | M | |
| 540 | Skipper | English | Captain. | M | |