In Croatia, Irsak families are Croats (from Virovitica ). In the past century, relatively most of Croatian residents bearing this family name were born in Virovitica.
Prevalence
About 10 people with faimily name Irsak live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Rijeka (<5), Zagreb (<5), Vinica in Ivanec area (<5), Goli Breg (<5), and in Velika Trapinska in Virovitica area (<5).
