Biruš families are Croats and they are mostly from Pregrada area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Pregrada area. In Škalić Zagorski in Pregrada area every tenth inhabitant had the family name Biruš.
Prevalence
About 150 people with faimily name Biruš live in Croatia today, in 60 households. There were 140 of them in the middle of the past century, and their number increased by 0 percent. They are located in 8 Croatian counties, in 10 cities and 21 other places, mostly in Zagreb (40), Kalinovac in Djurdjevac area (25), Ivanic Desinicki in Pregrada area (20), Cazma (15), and in Rijeka (10).
Outside Croatia
At least three families with this surname emigrated from Croatia to the United States (2) and Spain (1). Family name Biruš (including: Birus , Birusha , Byrus and Birush ) is present in 17 countries worldwide. "Byrus " is used by small number of people in the United States.
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.