In Croatia, Parašilovac families are almost entirely Croats (from Zupanja area ), barely Slovenes (also from Zupanja area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Vinkovci.
Prevalence
About 80 people with faimily name Parašilovac live in Croatia today, in 30 households. There were 60 of them in the middle of the past century, and their number increased by 20 percent. They are located in 6 Croatian counties, in 6 cities and threee other places, mostly in Gradiste in Zupanja area (60), Zagreb (<10), Josipovac (<5), Slavonski Brod (<5), and in Zupanja (<5).
Outside Croatia
Family name Parašilovac is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.