| Name | Meaning | Gender | Origin |
|---|
| Jango | | Unisex | Hebrew |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Jasper | Black stone
| Male | Persian |
| Java | Brewed coffee | Female | Anglicization |
| Joel | God is willing, Jehova is the Lord | 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 |
| Julius | after Julius Caesar | Male | Latin |
| Keanu | cool breeze over the mountains | Male | Hawaiian |
| Khan | An Indian ruler or official | Unisex | |
| Kipling | after Rudyard Kipling, writer | Unisex | |
| Kirk | church | Male | Norse |
| Laszlo | after the character in the movie Real Genius | Male | Hungarian |
| Lee | Healer
| Male | English |
| Legolas | Tolkien, Lord of the Rings | Unisex | |
| Leland | from the meadow land | Male | English |
| Leo | Lion.
| Male | Latin |
| Leopold | after Leopoldo in the movie Blood and Roses | Male | |
| Lestat | | Unisex | Hebrew |
| Lester | Fortified place.
| Male | English |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |
| Lex | Protector Of Mankind | Male | English |
| Link | English, town by the pool | Male | Word |
| Linus | flaxen-haired | Male | Greek |
| Linux | | Unisex | Hebrew |