| Name | Meaning | Gender | Origin |
|---|
| Jasper | Black stone
| Male | Persian |
| Jenson | son of Jens | Male | Scandinavian |
| Jeremiah | Exalted of the Lord
| Male | Hebrew |
| Jett | Jet Black Gem | Male | English |
| Jonah | Dove. In the bible Jonah was on board a ship God caused to sink: sailors traditionally use the name Jonah to personify someone who brings bad luck.
| Male | Hebrew |
| Jonas | Dove. Variant of Hebrew Jonah.
| Male | Greek |
| Jose | Jehovah increases | Male | Spanish |
| 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 |
| Kasimir | Famous, Great Destroyer | Unisex | Slavic |
| Kingston | From the king's village or estate King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Lachlan | From the land of lakes.
| Male | Scottish |
| Lea | weary or meadow | Female | English |
| Leah | cow, weary one; glad tidings; mistress, ruler | Female | Hebrew |
| Leda | happy | Female | Greek |
| Leland | from the meadow land | Male | English |
| Lennon | small cloak or cape | Male | Irish |
| Lennox | amid the lems, from the field of elm trees | Male | Scottish |
| Leo | Lion.
| Male | Latin |
| Lester | Fortified place.
| Male | English |
| Levi | United | Male | Hebrew |
| Lincoln | Capital of Nebraska, USA. Old English: home by the pond | Male | English |
| Lucius | Light | Male | Roman |
| Marshall | Man who looks after a nobleman's estate, keeper of the horses; steward | Male | |