Cognomen 성준 (성준 
, Seongjun 
, Sung-Jun ) , in the entire world, is a very rare last name. The last name 성준 is characteristic of Cambodia, where it is a very rare surname, China, where it is an extremely rare surname, and Malaysia. Not in comparison with a country's population, this name is the most popular in China, Cambodia, and the United States. Much more prevalently, 성준 is the forename as well as the last name.