| Name | Meaning | Gender | Origin |
|---|
| Jaida | Precious green stone | Female | English |
| Jasmin | Jasmin flower | Female | Indian |
| Jaws | Bones that form the mouth. A dangerous situation - "The Jaws of Death" | Unisex | English |
| Jazz | The romantic music | Unisex | English |
| Jennis | Variation Of Jenny Which Is A Diminutive Of Jane And Jennifer. | Unisex | American English |
| Jet | Black gemstone | Unisex | English |
| Jilly | Down-bearded youth | Unisex | Latin |
| Jojo | Monday born | Unisex | African |
| Joy | Joy | Female | English |
| Judy | Of Judea | Female | Hebrew |
| Julie | Down-bearded youth | Female | Latin |
| Juliet | Down-bearded youth | Female | Latin |
| Justina | Righteous | Female | Latin |
| Kamryn | Crooked nose | Female | Gaelic |
| Karen | Pure | Female | Greek |
| Karma | Action | Female | Sanskrit |
| Katia | Pure | Female | Greek |
| Katie | Pure | Female | Greek |
| Katina | Pure | Female | Greek |
| Kazia | A Bark Of Cinnamon. | Female | English |
| Keilah | Lively: Aggressive. Variant Of Kelly. | Female | English |
| Keira | Dark | Female | Gaelic |
| Kelly | War | Female | Gaelic |
| Kendall | Valley of the River Kent | Female | Gaelic |
| Kerry | Country of the children of Ciar | Female | Gaelic |
| Kewpie | | Unisex | Hebrew |
| Kimberley | Variable prefix + forest clearing | Unisex | English |
| Kirby | Church settlement | Female | Norse |
| Kitty | Pure | Female | Greek |
| Kylie | Boomerang | Female | Pacific Islander |