| Kiyomi | Woman | Japanese Names |
| Kiyono | Woman | Japanese Names |
| Kiyoshi | Unisex | Japanese Names |
| Kiyoto | Man | Japanese Names |
| Kiyoye | Woman | Japanese Names |
| Ko | Man | Japanese Names |
| Kohaku | Unisex | Japanese Names |
| Kohana | Woman | Japanese Names |
| Koharu | Woman | Japanese Names |
| Kohei | Man | Japanese Names |
| Koichi | Man | Japanese Names |
| Koji | Man | Japanese Names |
| Koko | Woman | Japanese Names |
| Kokuro | Woman | Japanese Names |
| Koma | Woman | Japanese Names |
| Kosuke | Unisex | Japanese Names |
| Kota | Man | Japanese Names |
| Kotaro | Man | Japanese Names |
| Koto | Woman | Japanese Names |
| Kotone | Woman | Japanese Names |