In Croatia, Siča families are Croats (from Ozalj ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Ozalj. In Škaljevica in Ozalj every twentieth inhabitant had the family name Siča.
Prevalence
About 10 people with faimily name Siča 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 threee naselja i to in Zaluka (<10), Ozalj (<5), and in Skaljevica (<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.