Family name Ruengaurai (Ruengaurai 
) , all around the world, is an extremely rare last name. The cognomen Ruengaurai is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much less frequently, Ruengaurai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruengaurai | Thailand |