Cognomen Jungsun (Jungsun 
) , around the world, is a rare last name. The cognomen Jungsun is habitual in South Korea, where it is quite a rare surname, Malaysia, where it is a very rare surname, and Chile, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in South Korea, China, and Malaysia. Very seldom, Jungsun is the forename as well as the last name.