| Name | Meaning | Gender | Origin |
|---|
| Keely | Beautiful | Unisex | Irish |
| Keiko | Japanese for happy or beloved | Female | Japanese |
| Keira | after the actress Keira Knightley | Female | Irish |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelila | laurel, crown | Female | Hebrew |
| Kelly | Lively: aggressive.
| Female | Irish |
| Kelsey | Ceol's island, beautiful island; from the ship's island, shipping harbor | Female | English |
| Kendall | ruler of the valley | Female | English |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Kermit | free man | Male | Irish |
| Keziah | cassia tree | Female | Hebrew |
| Killian | church | Male | Irish |
| Kimbra | From The Royal Fortress Meadow | Unisex | English |
| Kimi | righteous | Female | Japanese |
| Kinsey | victorious prince | Female | English |
| Kira | Dark Lady.
| Female | Russian |
| Kirby | church settlement | Male | Norse |
| Kirk | church | Male | Norse |
| Kisa | Russian for kitty | Unisex | |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kizzie | Cinnamon tree | Unisex | Hebrew |
| Klara | Clear, Bright | Unisex | Scandinavian |