| Name | Meaning | Gender | Origin |
|---|
| Jerome | sacred name | Male | Greek |
| Jersey | From A Section Of England | Male | English |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jitterbug | | Male | Hebrew |
| Jovan | Jove-like, majestic | Male | Slavic |
| Jubilee | ram's horn | Female | Hebrew |
| Juniper | Juniper Tree | Female | English |
| Juno | queen of the heavens | Female | Latin |
| Kanga | | Male | Hebrew |
| Keegan | A thinker: fiery. Form of Hugh.
| Male | Irish |
| Keenan | Ancient
| Male | Irish |
| Kendra | Blend of Ken: (royal obligation:clear water) and Sandra: (protector of man) or Andrea: (manly or masculine).
| Female | English |
| Keno | | Unisex | Hebrew |
| Kerry | dark, dark-haired | Male | Irish |
| Kilo | | Unisex | Hebrew |
| Kinky | | Unisex | |
| Koda | | Male | |
| Lance | knight's attendant; land | Male | English |
| Levi | United | Male | Hebrew |
| Lightning | | Unisex | Hebrew |
| Lively | | Unisex | |
| Loki | To Break | Male | Norse |
| Lulu | Pet form of the names Louise or Louella.
| Female | English |
| Malibu | Noisy Surf | Male | Native American Chumash |
| Mambo | A Latin dance resembling the rumba. | Unisex | |