Šišak families are Croats and they are mostly from Donja Stubica area. In the past century, relatively most of Croatian residents bearing this family name were born in Donja Stubica area and in Skradin.
Prevalence
About 170 people with faimily name Šišak live in Croatia today, in 70 households. There were 150 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 16 cities and 11 other places, mostly in Zagreb (35), Sveti Matej in Donja Stubica area (25), Sibenik (25), Dubravice (20), and in Skradin (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1683 in source Catholic Church Parish Records.