Cognomen Chekun (Чекун 
, Chekun 
) , all over the world, is a rare last name. The cognomen Chekun is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Estonia. In absolute terms, it is the most numerous in Eastern Europe, particularly Belarus, Ukraine, and Russia. Very seldom, Chekun is the forename as well as the last name.