Cognomen Jungja (Jungja 
) , throughout the world, is a rare last name. The last name Jungja is characteristic of South Korea, where it is a rare surname, Cambodia, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. In absolute terms, it most frequently occurs in South Korea, China, and Thailand. More frequently, Jungja is the forename as well as the last name.