Family name Йин (Yin 
, Jin , Йин 
) , in the world, is a prevalent cognomen. The family name Йин is characteristic of Mongolia, where it is a prevalent surname, Malaysia, where it is a widespread surname, and Cayman Islands, where it is a common surname (explore the name in all countries). Measured by absolute frequency, the name is most common in China, Malaysia, and Mongolia. Much less frequently, Йин is the forename as well as the last name.