| Koume | Woman | Japanese Names |
| Kourtney | Unisex | American Names |
| Kouta | Man | Japanese Names |
| Kovit | Man | Thai Names |
| Kozakura | Woman | Japanese Names |
| Kozue | Unisex | Japanese Names |
| Kozuye | Woman | Japanese Names |
| Kramer | Man | German Names |
| Kreeli | Woman | American Names |
| Kreios | Man | Greek Names |
| Krikor | Man | Armenian Names |
| Kris | Unisex | American Names |
| Krisalyn | Woman | American Names |
| Krish | Man | Indian Names |
| Krishna | Unisex | Indian Names |
| Krissa | Woman | American Names |
| Krista | Woman | Scandinavian Names |
| Kristen | Woman | German Names |
| Krister | Man | Scandinavian Names |
| Kristian | Man | Scandinavian Names |