Family name Rujirek (Rujirek 
) , all around the world, is a rare last name. The cognomen Rujirek is characteristic of Thailand, where it is a rare surname, Cambodia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Rujirek is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rujirek | Thailand, United Kingdom, United States, Cambodia, China |