| Abbreviation | Definition |
|---|---|
| RJ | Rio de Janeiro |
| RJ | Ripper Junior |
| RJ | Rocket Jump |
| RJ | Rodney Jerkins |
| RJ | Roid Jerk |
| RJ | Rong Jian |
| RJ | Rosemary Jane |
| RJ | Rouge Jedi |
| RJ | Royal Jungle |
| RJ | Rrrrrrr Jimlad |
| RJ | Rylie Jones |
| RJA | Raymond James Associates |
| RJA | Red Jumpsuit Apparatus |
| RJA | Rolf Jensen and Associates |
| RJA | Roxanne Jakosalem Abarquez |
| RJA | Royal Jordanian Airlines |
| RJAH | Robert Jones and Agnes Hunt |
| RJAO | Raspberry Jalapeno Ambrosia Original |
| RJB | Reusable Java Bean |
| RJB | Richard John Bateman |