| Name | Meaning | Gender | Origin |
|---|
| Jessica | God's grace | Female | Hebrew |
| Joaquin | Abbreviation of the Hebrew name Jehoichin meaning Jehovah has established. Joaquin Miller the colorful 19th century poet-adventurer of the American west.
| Male | Spanish |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| John | God is merciful | Male | Hebrew |
| Jonathan | God gives | Male | Hebrew |
| Jordan | The descending river, to flow | Male | Hebrew |
| Jose | Jehovah increases | Male | Spanish |
| Joseph | God will increase | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Julia | Youthful
| Female | Latin |
| Julian | Jove's child. Form of Julius and family clan name of several powerful Roman emperors. Biblical Roman centurion Julius saved Paul's life during a hazardous voyage
| Male | English |
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| Juliet | youthful | Female | English |
| June | 6Th Month | Female | English |
| Karen | pure | Female | Danish |
| Katherine | Pure. Used since third century A.D. Early Latin forms Katerina and Caterina became Katharine and Catherine. French Cateline and English Catlyn came into wider use during medieval period when variants multiplied.
| Female | Greek |
| Katie | Variant of Katherine. Pure.
| Female | English |
| Killian | church | Male | Irish |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Lachlan | From the land of lakes.
| Male | Scottish |
| Lamont | Man Of Law | Male | Scottish |
| Lane | narrow road | Male | English |