Surname 坦金 (坦金 
, Tankin 
) , across the world, is a rare family name. The surname 坦金 is habitual in Bulgaria, where it is a rare surname, Indonesia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in India, Indonesia, and the United States. Also, 坦金 is the forename as well as the last name.