| Name | Meaning | Gender | Origin |
|---|
| Hoover | Owner of a measure of land | Unisex | German |
| Hoss | | Unisex | Hebrew |
| Hugo | Mind, heart or spirit | Male | Germanic |
| Humberto | Famous giant. | Male | German |
| Igor | Warrior archer | Male | Norse |
| Jabba | | Unisex | Hebrew |
| Jaws | Bones that form the mouth. A dangerous situation - "The Jaws of Death" | Unisex | English |
| Jupiter | Father god | Unisex | Latin |
| Kai | Rejoice | Male | Finnish |
| Kaiser | Emperor: Variant Of Caesar. | Male | Latin |
| King | King's forest clearing | Male | English |
| Klondike | | Unisex | Hebrew |
| Kodiak | Island | Unisex | Russian |
| Kong | Empty, hollow, void | Male | Chinese |
| Langston | Long stone | Male | English |
| Limo | | Unisex | Hebrew |
| Mac | Son of | Male | Gaelic |
| Magnum | A large type of wine bottle. | Unisex | English |
| Magnus | Great | Male | Latin |
| Major | Greater | Male | Latin |
| Mamma | | Unisex | Hebrew |
| Marmaduke | Devotee of Maedoc | Male | Gaelic |
| Massimo | The greatest | Male | Latin |
| Maverick | Dissenter | Unisex | English |
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maximillian | Little Maximus | Male | Latin |
| Maximus | The greatest | Male | Latin |
| Mighty | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |