Last name น้ำส้ม (Namsom 
, Sordam 
, น้ำส้ม) , all over the world, is a rare surname. The family name น้ำส้ม is characteristic of Suriname, where it is quite a common surname, Netherlands, where it is a rare surname, and Thailand. Very seldom, น้ำส้ม is the forename as well as the last name.