Family name 瑞金 (瑞金 
, Ragin 
) , in all the world, is quite a common last name. The last name 瑞金 is habitual in Bulgaria, where it is quite a rare surname, Lithuania, where it is a rare surname, and the United States. Not in comparison with a country's population, the name is most common in China, the United States, and Bulgaria. More frequently, 瑞金 is the forename as well as the last name.