Cognomen 怀恩 (怀恩 
, Wyon 
) , in the entire world, is quite a rare surname. The cognomen 怀恩 is habitual in Denmark, where it is a rare surname, France, and Sweden. Measured by absolute frequency, it most frequently occurs in China, France, and Denmark. More frequently, 怀恩 is the forename as well as the last name.