Family name 红金 (红金 
, Hongjin 
) , worldwide, is quite a rare last name. The last name 红金 is habitual in South Korea, where it is a rare surname, China, where it is a very rare surname, and Thailand, where it is an extremely rare surname. In absolute terms, it is the most numerous in China, South Korea, and the United States. More prevalently, 红金 is the forename as well as the last name.