| Abbreviation | Definition |
|---|---|
| AJ | Alex James |
| AJ | Alex Jenks |
| AJ | Alex Johnson |
| AJ | Alex Joseph |
| AJ | Alexander James |
| AJ | Alexander Jr |
| AJ | Alexandra Jane |
| AJ | Alfonso Joseph |
| AJ | Alfred Jacobsen |
| AJ | Alfred Joseph |
| AJ | Alice Jane |
| AJ | Alice Joyce |
| AJ | Alissa Jennifer |
| AJ | Allan Jackson |
| AJ | Allan James |
| AJ | Allison Jaime |
| AJ | Allison Joy |
| AJ | Alvo Jo |
| AJ | Amanda Jean |
| AJ | Amanda Junior |