Cognomen Changsuk (Changsuk 
) , globally, is a rare surname. The family name Changsuk is habitual in South Korea, where it is a rare surname, Thailand, where it is a very rare surname, and Cambodia. Not in comparison with a country's population, the name is most common in South Korea, Thailand, and China. More prevalently, Changsuk is the forename as well as the last name.