| Name | Meaning | Gender | Origin |
|---|
| Jagger | Pedlar | Male | English |
| Jake | Supplanted | Male | Hebrew |
| Jazz | The romantic music | Unisex | English |
| Jerome | Sacred name | Male | Greek |
| Jesse | Gift | Male | Hebrew |
| Jester | A fool at medieval courts | Unisex | English |
| Jett | Black gemstone | Male | English |
| Jilly | Down-bearded youth | Unisex | Latin |
| Jingles | | Unisex | Hebrew |
| Justin | Righteous, just, fair | Male | Latin |
| Kaiser | Emperor: Variant Of Caesar. | Male | Latin |
| Keane | Descendant of Cathán | Male | Gaelic |
| Kelsey | Cenel's land | Unisex | English |
| Kent | Uncertain, perhaps coastal region | Male | English |
| Kipper | A pointed hill | Unisex | English |
| Kishi | Beach, seashore | Unisex | Japanese |
| Kona | World rule | Unisex | Gaelic |
| Lachlan | Warrior from the Land of the Lochs | Unisex | Gaelic |
| Lady | Lady | Unisex | English |
| Laird | Lord | Male | English |
| Laramie | Surname With American Connotations Due To Laramie: A Town In Wyoming USA On The Overland Trail Of The Pony Express. | Unisex | American English |
| Leif | Descendant | Male | Norse |
| Lenny | Brave lion | Unisex | German |
| Leo | Lion | Male | Latin |
| Levi | Combined | Male | Hebrew |
| Lizzy | My God is a vow | Unisex | Hebrew |
| Lucky | Fortunate | Unisex | English |
| Mace | Club | Male | French |
| Madison | Son of Maud | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |