| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 401 | Sihtric | Anglo-Saxon | Name of a king. | M | |
| 402 | Sinley | Anglo-Saxon | Friendly. | M | |
| 403 | Slean | Anglo-Saxon | Strikes. | M | |
| 404 | Slecg | Anglo-Saxon | Hammer. | M | |
| 405 | Snell | Anglo-Saxon | Nold. | M | |
| 406 | Steadman | Anglo-Saxon | Dwells at the farm. | M | |
| 407 | Stearc | Anglo-Saxon | Severe. | M | |
| 408 | Stedman | Anglo-Saxon | Dwells at the farm. | M | |
| 409 | Stefn | Anglo-Saxon | Stem. | M | |
| 410 | Stepan | Anglo-Saxon | Exalts. | M | |
| 411 | Stewart | Anglo-Saxon | Steward. | M | |
| 412 | Stewert | Anglo-Saxon | Steward. | M | |
| 413 | Stillman | Anglo-Saxon | Gentle. | M | |
| 414 | Stilwell | Anglo-Saxon | From the tranquil stream. | M | |
| 415 | Storm | Anglo-Saxon | Storm. | M | |
| 416 | Strang | Anglo-Saxon | Strong. | M | |
| 417 | Stuart | Anglo-Saxon | Steward. | M | |
| 418 | Swift | Anglo-Saxon | Swift. | M | |
| 419 | Swithun | Anglo-Saxon | Name of a saint. | M | |
| 420 | Synn | Anglo-Saxon | Sin. | M | |