Family name Rui En (Rui En 
) , all around the world, is a very rare last name. The last name Rui En is characteristic of Singapore, where it is a rare surname, Malaysia, where it is a very rare surname, and China, where it is an extremely rare surname. Likewise, Rui En is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rui En | Singapore, Malaysia, China |