| Name | Meaning | Gender | Origin |
|---|
| Ian | Form of John | Male | Scottish |
| Ira | watchful, descendant | Male | Hebrew |
| Jace | Hebrew, the Lord is salvation | Male | Hebrew |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| Jason | the Lord is salvation | Male | Hebrew |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jay | jaybird | Male | Latin |
| Jayce | Moon | Male | English |
| Jean | God is gracious | Male | |
| Jett | Jet Black Gem | Male | English |
| Joel | God is willing, Jehova is the Lord | Male | Hebrew |
| John | God is merciful | Male | Hebrew |
| Josh | God Saves | Unisex | English |
| Kai | Fire
| Male | Hawaiian |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kerry | dark, dark-haired | Male | Irish |
| Kim | chief | Male | English |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Kitten | | Unisex | |
| Kiwi | | Unisex | Hebrew |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Lamb | | Unisex | |