| Name | Meaning | Gender | Origin |
|---|
| Jack | From John - God's gracious gift | Male | English |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jager | Carter | Unisex | English |
| Jaguar | Large Spotted Feline | Male | English |
| Jason | the Lord is salvation | Male | Hebrew |
| Jaws | Bones that form the mouth. A dangerous situation - "The Jaws of Death" | Unisex | |
| Jigsaw | | Unisex | Hebrew |
| Lestat | | Unisex | Hebrew |
| Lucifer | light-bearer | Male | Latin |
| Lucifer | light-bearer | Male | Latin |
| Lugosi | after 1940s Dracula actor Bela Lugosi | Unisex | |
| Lurch | To stagger. | Unisex | |
| Marcus | warlike | Male | Latin |
| Medusa | Guardian | Unisex | Latin |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Michael | who is like God | Male | Hebrew |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Norman | man from the north | Male | English |
| Nosferatu | | Unisex | |
| Nott | Hogwarts student.
| Male | |
| Omen | | Male | |
| Phantom | Something elusive. A ghost | Unisex | |
| Poe | peacock | Male | |
| Pookah | | Unisex | Hebrew |
| Pugsley | | Unisex | Hebrew |