| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 821 | Senior | French | Lord of the manor. | M | |
| 822 | Sennet | French | Wise. | M | |
| 823 | Severin | French | Strict; restrained. A saint's name. | M | |
| 824 | Sevrin | French | Strict; restrained. A saint's name. | M | |
| 825 | Seymour | French | From St. Maur (French place name). | M | |
| 826 | Sid | French | Diminutive of Sidney: From Saint-Denis (place name). | M | |
| 827 | Sidney | French | From Saint-Denis (place name). This name has recently become popular for girls as well as boys. Famous Bearer: actor Sidney Poitier. | M | |
| 828 | Silvestre | French | Trees; sylvan. | M | |
| 829 | Sinclair | French | St. Clair. | M | |
| 830 | Sinclaire | French | St. Clair. | M | |
| 831 | Sinjin | French | St. John. | M | |
| 832 | Somer | French | Bom in summer. | M | |
| 833 | Somerville | French | From the summer estate. | M | |
| 834 | Sorel | French | Reddish brown hair. | M | |
| 835 | Soren | French | Reddish brown hair. | M | |
| 836 | Sorrell | French | Reddish brown hair. | M | |
| 837 | Stephan | French | Crown; wreath. Variant of Stephen. | M | |
| 838 | Sumarville | French | From the summer estate. | M | |
| 839 | Sumner | French | A summoner. | M | |
| 840 | Syd | French | Diminutive of Sidney: From Saint-Denis (place name). | M | |