| Name | Meaning | Gender | Origin |
|---|
| Iggy | Latin, fiery | Male | Latin |
| Jango | | Unisex | Hebrew |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Jolly | Full of good humor and high spirits. | Unisex | |
| Jumbo | Unusually large person, animal or thing e.g. Jumbo Jet. From African 'jumba' meaning elephant. | Male | |
| Jupiter | Zeus, Father | Male | Roman |
| Karen | pure | Female | Danish |
| Katy | pure | Female | Short |
| Katy | pure | Female | Short |
| King | King's field. King is one of several titles occasionally used as given names.
| Male | English |
| Korky | | Unisex | |
| Lazyboy | | Unisex | Hebrew |
| Leo | Lion.
| Male | Latin |
| Leonard | lion-hearted | Male | |
| Lolli | | Unisex | |
| Lovebug | | Unisex | |
| Lug | Welsh Form Of Luke (Light) | Unisex | Welsh |
| Marble | | Unisex | |
| Margie | Pearl | Female | English |
| Meatball | | Male | |
| Meatloaf | after the rock band | Male | |
| Melvin | Chief
| Male | English |
| Mischief | One that causes minor trouble or disturbances | Male | |
| Mittens | | Unisex | |
| Moe | delivered | Male | English |