| Name | Meaning | Gender | Origin |
|---|
| Jakob | Supplanter, Representative | Unisex | German |
| Jean | God is gracious | Male | |
| Jeremy | God will uplift, appointed by God | Male | English |
| Jerk | Ever Powerful Ruler | Unisex | Swedish |
| Jerome | sacred name | Male | Greek |
| Jessy | God's Gracious Gift | Unisex | Hebrew |
| Jock | God has been gracious: has shown favor. Based on John or Jacques.
| Male | Scottish |
| Joey | Abbreviation of Joseph.
| Male | |
| Joey | Abbreviation of Joseph.
| Male | |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Jonathan | God gives | Male | Hebrew |
| Joseph | God will increase | Male | Hebrew |
| 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 |
| Kai | Fire
| Male | Hawaiian |
| Karin | Pure | Unisex | Greek |
| Kevin | handsome | Male | Irish |
| Kip | From The Pointed Hill | Unisex | English |
| Konrad | Bold, Wise Councelor | Unisex | German |
| Kunz | Honest Advisor | Unisex | German |
| Lars | after the Metallica drummer Lars Ulrich | Male | Scandinavian |
| Leon | lion | Male | Greek |
| Leopold | after Leopoldo in the movie Blood and Roses | Male | |
| Lina | tender | Unisex | |
| Linn | Beautiful | Unisex | English |
| Linus | flaxen-haired | Male | Greek |