| Name | Meaning | Gender | Origin |
|---|
| Izzy | Salvation By God | Male | English |
| Jacques | supplanter | Male | |
| Jager | Carter | Unisex | English |
| Jaguar | Large Spotted Feline | Male | English |
| Jean-Claude | | Unisex | Hebrew |
| Jeraldo | Variant of Gerald Rules by the spear.
| Male | |
| Jeremias | Exalted of the Lord
| Male | |
| Jerrald | Variant of Gerald Rules by the spear.
| Male | |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Johnnie | Modern feminine of John and Jon.
| Male | English |
| Jorge | Spanish form of George farmer
| Male | Spanish |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Kafir | | Male | Hebrew |
| Kai | Fire
| Male | Hawaiian |
| Kamden | Winding Valley. Form of Camden.
| Male | Spelling |
| Karsten | Blessed or annointed one. Alternate Spelling: Carsten. Variant of Kristian.
| Male | Spelling |
| Kazak | | Male | Hebrew |
| Kazmir | | Male | Hebrew |
| Keenon | Surname.
| Male | |
| Keets | | Male | Hebrew |
| Kelloggs | | Male | Hebrew |
| Ken And Barbie | | Unisex | Hebrew |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Klaw | | Male | Hebrew |
| Knuckles | | Male | Hebrew |