| Name | Meaning | Gender | Origin |
|---|
| Jory | God will uplift
| Male | English |
| Joseph | God will increase | Male | Hebrew |
| Joshua | God is salvation
| Male | Hebrew |
| Jossie | | Unisex | Hebrew |
| Jovan | Jove-like, majestic | Male | Slavic |
| Judd | praised | Male | Medieval |
| Jules | youthful; soft, downy | Male | |
| 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 |
| Julio | Latin, youthful, downy-bearded | Male | Spanish |
| Julius | after Julius Caesar | Male | Latin |
| Justa | Just, Fairness | Unisex | Latin |
| Justin | just, true | Male | Latin |
| Justus | Just | Male | Roman |
| Kahlil | after Lebanese writer Kahlil Gibran | Male | Arabic |
| Kai | Fire
| Male | Hawaiian |
| Kalika | rosebud | Unisex | |
| Kalyn | Slender | Unisex | English |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kasha | | Unisex | Hebrew |
| Kaycee | Vigilant, Watchful | Unisex | English |
| Keegan | A thinker: fiery. Form of Hugh.
| Male | Irish |
| Keely | Beautiful | Unisex | Irish |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kermit | free man | Male | Irish |
| Killian | church | Male | Irish |