| Abbreviation | Definition |
|---|---|
| PGRFC | Preston Grasshoppers Rugby Football Club |
| PRFC | Pasadena Rugby Football Club |
| PRFC | Portland Rugby Football Club |
| PRFC | Portsmouth Rugby Football Club |
| PRFC | Providence Rugby Football Club |
| PRL | Premier Rugby Limited |
| PRLA | Portuguese Rugby League Association |
| PRO | Professional Rugby Organization |
| PRPW | Pacific Rugby Players Welfare |
| PRU | Potomac Rugby Union |
| PRUI | Persatuan Rugby Union Indonesia |
| PURC | Pakuranga United Rugby Club |
| QRA | Quad Rugby Association |
| QRFU | Quebec Rugby Football Union |
| QRL | Queensland Rugby League |
| QRU | Queensland Rugby Union |
| RC | Rugby Club |
| RCGM | Rugby Club Grand Mottois |
| RCHT | Rugby Club De Haute Tarentaise |
| RCLG | Rugby Club Livry Gargan |