Cognomen Sangnam (상남 
, Sangnam 
) , around the globe, is a very rare last name. The last name Sangnam is habitual in Thailand, where it is a very rare surname, China, where it is an extremely rare surname, and the United States. Measured by absolute frequency, this name is the most popular in Thailand, China, and India. Predominantly, Sangnam is the forename as well as the last name.