Surname ส. (So 
, ส. 
) , in all the world, is a widespread cognomen. The family name ส. is habitual in Hong Kong, where it is a widespread surname, British Virgin Islands, where it is a common surname, and Cayman Islands (explore the name in all countries). Measured by absolute frequency, it is commonest in Hong Kong, Egypt, and China. Likewise, ส. is the forename as well as the last name.