Surname สุนทรสาร (สุนทรสาร 
, Suntanasarn , Suntonsarn) , all around the world, is a very rare cognomen. The surname สุนทรสาร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, สุนทรสาร is the forename as well as the last name.