Cognomen ยาวะประภาษ (Yawning 
, ยาวะประภาษ 
) , all over the world, is a very rare last name. The last name ยาวะประภาษ is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, ยาวะประภาษ is the forename as well as the last name.