Last name สวัส (Sawat 
, สวัส ) , in the world, is quite a rare surname. The cognomen สวัส is habitual in Saudi Arabia, where it is quite a rare surname, Thailand, where it is a rare surname, and Malaysia. In absolute terms, the name is most common in Thailand, Saudi Arabia, and India. More frequently, สวัส is the forename as well as the last name.