Family name Kosmyk (Kosmyk 
) , all over the world, is a very rare last name. The family name Kosmyk is habitual in Poland, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and Ukraine. Measured by absolute frequency, it is the most numerous in Poland, the United States, and the United Kingdom. More frequently, Kosmyk is the forename as well as the last name.