| Name | Meaning | Gender | Origin |
|---|
| Jupiter | Zeus, Father | Male | Roman |
| Kafka | jackdaw | Male | Czech |
| Kim | chief | Male | English |
| Kit | Nickname for Christopher. Frontiersman Kit Carson.
| Male | English |
| Lad | Teaches | Unisex | Anglo-Saxon |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Legolas | Tolkien, Lord of the Rings | Unisex | |
| Lennie | Brave Lion | Unisex | English |
| Lennox | amid the lems, from the field of elm trees | Male | Scottish |
| Leon | lion | Male | Greek |
| Leopold | after Leopoldo in the movie Blood and Roses | Male | |
| Lestat | | Unisex | Hebrew |
| Luke | Light | Male | Greek |
| Magnus | One who is great.
| Male | Latin |
| Marion | bitter | Male | |
| Martin | Warlike person. | Male | Latin |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Miles | of smiles | Male | Latin |
| Milo | Merciful.
| Male | Latinized |
| Milo | Merciful.
| Male | Latinized |
| Mingus | tenants of a manor | Male | Scottish |
| Misha | Variant of Michael.
| Male | Russian |
| Mordecai | warrior | Male | Hebrew |
| Mordred | Brave | Unisex | English |
| Morgaine | Sea Circle | Unisex | French |