| Name | Meaning | Gender | Origin |
| Cari | Flows Like Water | Female | Turkish |
| Cassie | Purity | Female | Greek |
| Cat | Catlike | Male | Scottish |
| Catalina | Pure IZABEL | Female | English |
| Catarina | Pure | Female | Italian |
| Catherine | Innocent | Female | Anglo |
| Cathy | Form Of The Greek Catherine Meaning Pure. | Female | English |
| Karen | Pure | Female | Danish |
| Kari | Joyful Song | Female | French |
| Kasia | Alert. Vigorous. Modern Variant Of Casey. | Male | English |
| Kat | English Abbreviation Of Katherine. Pure. | Female | English |
| Katarina | | Female | English |
| Kate | English Abbreviation Of Katherine. Pure. | Female | English |
| Kathleen | Innocent | Female | Irish |
| Katie | Variant Of Katherine. Pure. | Female | English |
| Katina | Pure. | Female | English |
| Katinka | Pure | Female | Hungarian |
| Katrina | Variant Of Katherine. Pure. | Female | English |
| Kit | Nickname For Christopher. Frontiersman Kit Carson. | Male | English |
| Kitty | Variant Of Katherine. Pure. | Female | English |
| Trina | Innocent | Female | Greek |