Family name Kirjak (Киряк 
, Кирьяк 
, Kirjak 
) , globally, is a rare cognomen. The surname Kirjak is characteristic of Eastern Europe, particularly Bulgaria, where it is quite a rare surname, Hungary, and Belarus, where it is a rare surname. In absolute terms, it is commonest in Eastern Europe, particularly Russia, Bulgaria, and Hungary. Also, Kirjak is the forename as well as the last name.