Family name 盖恩 (Gain 
, Gayn 
, Gaen 
) , all over the world, is a widespread surname. The last name 盖恩 is habitual in India, where it is quite a common surname, Bangladesh, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it is commonest in India, Bangladesh, and France. Very seldom, 盖恩 is the forename as well as the last name.