Ivanuša families are Croats and they are mostly from Ludbreg area. According to some sources they are from Slovenia (Salovci near Ormoz). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Cakovec.
Prevalence
About 190 people with faimily name Ivanuša live in Croatia today, in 80 households. There were 170 of them in the middle of the past century, and their number increased by 10 percent. They are located in 10 Croatian counties, in 14 cities and 26 other places, mostly in Zagreb (25), Ludbreg (25), Varazdin (15), Bartolovec in Varazdin area (15), and in Hrastovljan in Ludbreg area (15).
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.