| Abbreviation | Definition |
|---|---|
| JJ | Jimmy Junior |
| JJ | Joe Jones |
| JJ | Joel Jaqueline |
| JJ | Joey Junior |
| JJ | John James |
| JJ | John Jasper |
| JJ | John Joe |
| JJ | John John |
| JJ | John Joseph |
| JJ | John, Junior |
| JJ | Johnathan Johnson |
| JJ | Jon Jacob |
| JJ | Jon, Junior |
| JJ | Jonny, Junior |
| JJ | Joseph John |
| JJ | Josh Junior |
| JJ | Joshua Jacob |
| JJ | Joshua Jonathan |
| JJ | Josie Jo |
| JJ | Joy Junior |