Family name Stelnik (Stelnik 
, Стельник 
) , globally, is a rare last name. The cognomen Stelnik is characteristic of Ukraine, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. In absolute terms, it is the most numerous in Ukraine, Russia, and the United States. Very seldom, Stelnik is the forename as well as the last name.