| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 921 | Sebastiano | Greek | Revered. | M | |
| 922 | Sebestyen | Greek | Revered. | M | |
| 923 | Seoirse | Greek | Farmer. | M | |
| 924 | Seorsa | Greek | Farmer. | M | |
| 925 | Sidney | Greek | From Sidon. | M | |
| 926 | Sim | Greek | Diminutive of Simon: Snub-nosed. | M | |
| 927 | Simeon | Greek | Sign. | M | |
| 928 | Simon | Greek | Snub-nosed. Can also be a variant of a Hebrew name meaning 'hear; listen.' In the bible Simon was the name of two apostles including Simon Peter. | M | |
| 929 | Sinon | Greek | Convinced the Trojans to pull the horse inside the city walls. | M | |
| 930 | Sisyphus | Greek | Son of Aelous. | M | |
| 931 | Socrates | Greek | Name of a philosopher. | M | |
| 932 | Soterios | Greek | Savior. | M | |
| 933 | Spyridon | Greek | Round basket. | M | |
| 934 | Stacey | Greek | Diminutive of Eustace: Fruitful, productive. Famous bearer: St Eustace (Eustachins) was a martyred 2nd century Roman soldier. | M | |
| 935 | Stacy | Greek | Diminutive of Eustace: Fruitful, productive. Famous bearer: St Eustace (Eustachins) was a martyred 2nd century Roman soldier. | M | |
| 936 | Staffen | Greek | Victorious. | M | |
| 937 | Stamitos | Greek | Enduring. | M | |
| 938 | Stavros | Greek | Victorious. | M | |
| 939 | Steafan | Greek | Victorious. | M | |
| 940 | Steenie | Greek | Diminutive of Stephen: Crown; victorious. | M | |