| Name | Meaning | Gender | Origin |
|---|
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| John | God is merciful | Male | Hebrew |
| Johnny | the Lord is gracious | Male | English |
| Jojo | | Female | Hebrew |
| Jonathan | God gives | Male | Hebrew |
| Jorge | Spanish form of George farmer
| Male | Spanish |
| Joseph | God will increase | Male | Hebrew |
| Josh | God Saves | Unisex | English |
| Julius | after Julius Caesar | Male | Latin |
| Junior | Youthful person. Used to distinguish son from father where they have the same name | Male | Latin |
| Justice | Just, Fairness | Female | English |
| Karen | pure | Female | Danish |
| Kelly | Lively: aggressive.
| Female | Irish |
| Ken | Male Barbie Doll. | Male | English |
| Kenny | English, born of fire, handsome | Male | English |
| Kenya | Animal Horn | Female | Hebrew |
| Kevin | handsome | Male | Irish |
| Krystal | Crystal, Ice | Unisex | Greek |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Lance | knight's attendant; land | Male | English |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Laura | bay laurel | Female | Latin |
| Lauren | bay laurel | Female | English |
| Leon | lion | Male | Greek |