Rusak families are Croats and they are mostly from Koprivnica area. In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica area and in Cakovec.
Prevalence
About 140 people with faimily name Rusak live in Croatia today, in 60 households. There were 160 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 12 cities and 17 other places, mostly in Donja Dubrava in Koprivnica area (65), Zagreb (25), Kotoriba in Prelog area (15), Varazdin (10), and in Djurdjevac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.