| Siyamak | Man | Persian Names |
| Siyanda | Woman | African - Zulu Names |
| Siyavash | Man | Persian Names |
| Skaggs | Unisex | English Names |
| Skah | Man | Native American - Navajo or Sioux Names |
| Skanawati | Unisex | Native American - Onondaga Names |
| Skate | Unisex | American Names |
| Skinner | Unisex | English Names |
| Skip | Man | American Names |
| Skipper | Man | English Names |
| Skiriki | Man | Native American - Pawnee Names |
| Skule | Man | Scandinavian Names |
| Sky | Unisex | Scandinavian Names |
| Skyanna | Woman | American Names |
| Skye | Unisex | Scottish Names |
| Skyla | Woman | American Names |
| Skylar | Unisex | American Names |
| Slade | Man | English Names |
| Slaine | Unisex | Irish Names |
| Slash | Unisex | American Names |