Surname 정진 (정진 , Jung-Jin ) , across the world, is an extremely rare family name. Much more prevalently, 정진 is the forename as well as the last name.
Jeongjin, and ジョンジン
, Jung-Jin 
) , across the world, is an extremely rare family name. Much more prevalently, 정진 is the forename as well as the last name.