In Croatia, Hrastovšćak 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 Tomašnica in Ozalj every seventieth inhabitant had the family name Hrastovšćak.
Prevalence
About 10 people with faimily name Hrastovšćak live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only four naselja i to in Karlovac (<10), Zagreb (<5), Mali Erjavec (<5), and in Slapno (<5).
Outside Croatia
Family name Hrastovšćak is present in two countries on two continents.