Family name Корний (Korniy 
, Корний 
, Kornij 
) , all over the world, is a very rare cognomen. The surname Корний is characteristic of Belarus, where it is a rare surname, Ukraine, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Ukraine, Belarus, and Russia. Much less frequently, Корний is the forename as well as the last name.