In Croatia, Šiška families are Croats (from Koprivnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica area and in Middle Bosnia (Sarajevo area).
Prevalence
About 10 people with faimily name Šiška live in Croatia today, in three households only. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian counties, in one city and another small place , mostly in Rasinja in Koprivnica area (<10) and Split (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.