Cognomen Koshur (Кошур 
, Koshur 
) , in the world, is a rare surname. The family name Koshur is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Belarus, Ukraine, and Russia. Much less frequently, Koshur is the forename as well as the last name.