Cognomen Ruethairat (Ruethairat 
) , throughout the world, is a very rare last name. The last name Ruethairat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia. Much more frequently, Ruethairat is the forename as well as the last name.
Takun, Rachawaeng, Nualnamchit, Hasegawa, Suttipong, Aroonworachote, Chantamar, Kaeochamrat, Nissapakul, Wiriyasart, Wongrieng, Sawatdisan, Sawatprapa, Sawaengsin, Sirisombat, Kullayanond, Thammayarit, Wongprapai, Chanrangsee, Charoenchue, Chummongkon, Trakulchang, Plengwan, Kraimool, Kaeokham, Chinsawaspan, Thiin, Saelim, Saejaw, Aviphan, Kaenin, Kongma, Khunai, Rakkua, Lumain, Tabtub, Prasanchaimontee, Insorn, Srikwan, Chairak, Khanket, Krimool, Lumthong, Homruen, Meenanul, Sonachai, Srikhaorot, Arunsaeng, Wongla, and Pipatwattanakun