| Name | Meaning | Gender | Origin |
|---|
| Josh | God Saves | Unisex | English |
| Judd | praised | Male | Medieval |
| 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 |
| Jurgen | German form of George
| Male | |
| Justin | just, true | Male | Latin |
| Kai | Fire
| Male | Hawaiian |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kel | | Unisex | Hebrew |
| Ken | Male Barbie Doll. | Male | English |
| Kenan | possession | Unisex | |
| Kevin | handsome | Male | Irish |
| Kim | chief | Male | English |
| Klara | Clear, Bright | Unisex | Scandinavian |
| Kyle | A place-name referring to the narrows: a wood or a church.
| Male | Scottish |
| Kym | Royal Meadow | Unisex | English |
| Larry | Abbreviation of Lawrence or Laurence often used as an independent name.
| Male | English |
| Lars | after the Metallica drummer Lars Ulrich | Male | Scandinavian |
| Lee | Healer
| Male | English |
| Leif | heir, descendant | Male | Scandinavian |
| Lennon | small cloak or cape | Male | Irish |
| Lenny | brave lion | Male | English |
| Leo | Lion.
| Male | Latin |
| Leon | lion | Male | Greek |
| Leonid | Lion | Male | Russian |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |