| Name | Meaning | Gender | Origin |
|---|
| Jambo | Swahili for hello | Unisex | |
| Jerome | sacred name | Male | Greek |
| Jimmy | supplanter | Male | English |
| Joe | Abbreviation of Joseph.
| Male | English |
| Joe | Abbreviation of Joseph.
| 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 |
| Jumbo | Unusually large person, animal or thing e.g. Jumbo Jet. From African 'jumba' meaning elephant. | Male | |
| Kobi | | Unisex | Hebrew |
| Kovu | | Unisex | |
| Kula | Hawaiian for golden one | Unisex | |
| Leander | lion man | Male | Greek |
| Lennie | Brave Lion | Unisex | English |
| Lenny | brave lion | Male | English |
| Leo | Lion.
| Male | Latin |
| Leon | lion | Male | Greek |
| Leonard | lion-hearted | Male | |
| Leonardo | Lion-bold. Leonardo da Vinci is considered by many to be the most brilliant and creative men who ever lived.
| Male | Italian |
| Leonid | Lion | Male | Russian |
| Leopold | after Leopoldo in the movie Blood and Roses | Male | |
| Lester | Fortified place.
| Male | English |
| Lew | Refuge | Unisex | |
| Lion | Lion | Unisex | English |
| Lionel | Cousin of Lancelot
| Male | Latin |
| Livingston | dear friend's place | Male | English |