Cognomen เสถียรรัตน์ (เสถียรรัตน์ 
, Sathianrat) , all over the world, is a very rare last name. The cognomen เสถียรรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, เสถียรรัตน์ is the forename as well as the last name.