In Croatia, Žirković families are Croats (from Petrinja area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and in Petrinja area.
Prevalence
About 30 people with faimily name Žirković live in Croatia today, in 11 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in threee Croatian counties, threee cities and 5 other places, mostly in Lekenik in Petrinja area (<10), Staro Pracno (<10), Tisina Erdedska in Sisak area (<10), Varazdin (<5), and in Novi Farkasic (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.