| Name | Meaning | Gender | Origin |
|---|
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jax | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Modern |
| Jodie | From Judith - Admired and praised | Unisex | |
| Jordan | The descending river, to flow | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Jules | youthful; soft, downy | Male | |
| Justin | just, true | Male | Latin |
| Kai | Fire
| Male | Hawaiian |
| Kasper | treasurer | Male | Persian |
| Killian | church | Male | Irish |
| Kirk | church | Male | Norse |
| Koneko | | Unisex | Hebrew |
| Kym | Royal Meadow | Unisex | English |
| Lacy | Derived from Lacey which is a French Nobleman's surname brought to British Isles after Norman conquest.
| Male | |
| Leo | Lion.
| Male | Latin |
| Leon | lion | Male | Greek |
| Leonard | lion-hearted | Male | |
| Levi | United | Male | Hebrew |
| Liam | Form of William.
| Male | Irish |
| Logan | little hollow | Male | Scottish |
| Lorenzo | Form of Lawrence. Lorenzo de' Medici was a patron of Michaelangelo and Da Vinci.
| Male | Italian |
| Lowell | Beloved | Male | |