Cognomen Fayin (发银 
, 法银 , Fayin 
) , all around the world, is a rare surname. The last name Fayin is characteristic of China, where it is a very rare surname, Spain, and Venezuela, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in China, Spain, and India. More frequently, Fayin is the forename as well as the last name.