Surname Zaiarnyi (Заярный 
, Zaiarnyi 
) , across the world, is a rare last name. The family name Zaiarnyi is characteristic of Kazakhstan, where it is a rare surname, Russia, and Belarus. Not in comparison with a country's population, it is the most numerous in Russia, Kazakhstan, and Ukraine. Very seldom, Zaiarnyi is the forename as well as the last name.