| Name | Meaning | Gender | Origin |
|---|
| Jagger | a teamster | 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 |
| Javan | Son of Japtheth
| Male | Hebrew |
| Jay | jaybird | Male | Latin |
| Jayda | Green Gemstone | Unisex | English |
| Jesse | wealthy | Male | Hebrew |
| Jett | Jet Black Gem | Male | English |
| Johnnie | Modern feminine of John and Jon.
| Male | English |
| Joplin | the afflicted | Male | English |
| Jordan | The descending river, to flow | Male | Hebrew |
| Jordon | Flow, Descend | Unisex | English |
| Jules | youthful; soft, downy | Male | |
| Jupiter | Zeus, Father | Male | Roman |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Keegan | A thinker: fiery. Form of Hugh.
| Male | Irish |
| Kenan | possession | Unisex | |
| Killian | church | Male | Irish |
| Land | | Male | Hebrew |
| Lane | narrow road | Male | English |
| Lee | Healer
| Male | English |
| Lela | Night | Unisex | Arabic |
| Lennon | small cloak or cape | Male | Irish |
| Lennox | amid the lems, from the field of elm trees | Male | Scottish |
| Lexie | Protector Of Mankind | Unisex | English |