| Name | Meaning | Gender | Origin |
|---|
| Jesse | Gift | Male | Hebrew |
| Jessie | God is gracious | Female | Hebrew |
| Jester | A fool at medieval courts | Unisex | English |
| Jett | Black gemstone | Male | English |
| Jinx | Magic charm | Female | Latin |
| Joey | He will enlarge | Male | Hebrew |
| Joy | Joy | Female | English |
| Justine | Righteous, just, fair | Female | Latin |
| Kahlua | | Unisex | Hebrew |
| Katie | Pure | Female | Greek |
| Katy | Pure | Female | Greek |
| Kay | Pure | Male | Greek |
| Keisha | Abbreviation Of Lakeisha. Great Joy. | Female | American English |
| Kelsey | Cenel's land | Unisex | English |
| Keri | Country of the children of Ciar | Female | Gaelic |
| Kiara | Clear | Female | Latin |
| Kimberly | Variable prefix + forest clearing | Unisex | English |
| Kira | Dark | Female | Gaelic |
| Kishi | Beach, seashore | Unisex | Japanese |
| Lacy | Lacy | Female | English |
| Lady | Lady | Unisex | English |
| Lala | Tulip | Female | Persian |
| Latte | Expresso coffee mixed with steamed milk - a caf latte. | Unisex | English |
| Laura | Laurel | Female | Latin |
| Leah | Weary | Female | Hebrew |
| Lenny | Brave lion | Unisex | German |
| Lexi | Defending men | Female | Greek |
| Lexy | Defending men | Unisex | Greek |
| Lilly | Lily | Female | English |
| Lily | Lily | Female | English |