| Stillman | Man | English Names |
| Stina | Woman | Scandinavian Names |
| Stockton | Man | English Names |
| Stokes | Unisex | English Names |
| Stone | Man | English Names |
| Storm | Unisex | American Names |
| Stormy | Unisex | American Names |
| Story | Unisex | American Names |
| Stoyan | Man | Bulgarian Names |
| Stratton | Unisex | English Names |
| Streeter | Unisex | English Names |
| Strickland | Unisex | English Names |
| Strom | Man | German Names |
| Strong | Unisex | English Names |
| Struan | Man | Scottish Names |
| Stu | Man | English Names |
| Stuart | Man | Scottish Names |
| Studs | Man | American Names |
| Sturla | Man | Scandinavian Names |
| Stylanie | Woman | Greek Names |