Cognomen 瑞朱 (瑞朱 
) , in the world, is a very rare family name. The surname 瑞朱 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 瑞朱 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 瑞朱 | China |