Last name 蔡金 (蔡金 
, Chaikin 
) , in the entire world, is quite a rare surname. The last name 蔡金 is habitual in Israel, where it is quite a rare surname, the United States, where it is a rare surname, and Australia. In absolute terms, the name is most common in Israel, the United States, and Russia. Much less frequently, 蔡金 is the forename as well as the last name.