Surname 해인 (Haein 
, 해인 , Hae-In 
) , around the world, is a rare last name. The last name 해인 is habitual in Myanmar, where it is a rare surname, France, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Myanmar, France, and China. Much more frequently, 해인 is the forename as well as the last name.