| Simeona | Woman | Greek Names |
| Siren | Woman | Greek Names |
| Sirius | Man | Greek Names |
| Socrates | Man | Greek Names |
| Sophelia | Woman | Greek Names |
| Sophia | Woman | Greek Names |
| Sophocles | Man | Greek Names |
| Sophronia | Woman | Greek Names |
| Soteria | Woman | Greek Names |
| Sotiria | Woman | Greek Names |
| Sotirios | Man | Greek Names |
| Sotiris | Man | Greek Names |
| Sparta | Unisex | Greek Names |
| Spiro | Man | Greek Names |
| Spyridon | Man | Greek Names |
| Stacey | Woman | Greek Names |
| Stamatia | Woman | Greek Names |
| Stamatios | Man | Greek Names |
| Stavros | Man | Greek Names |
| Stefanos | Man | Greek Names |