In Croatia, Maruščak families are Croats (from Slavonski Brod area ). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod area and in Slavonski Brod.
Prevalence
About 20 people with faimily name Maruščak live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, in one city and another small place , mostly in Sibinj in Slavonski Brod area (10) and Zagreb (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over seventy times, the first time 1842 in source Catholic Church Parish Records 1842.