In Croatia, Buzjak families are Croats (from Zabok ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Lepoglava area.
Prevalence
About 60 people with faimily name Buzjak live in Croatia today, in 30 households. There were 110 of them in the middle of the past century, and their number halved. They are located in 6 Croatian counties, in 6 cities and 5 other places, mostly in Zagreb (30), Bedekovcina in Lepoglava area (<10), Grdenci (<10), Salovec (<10), and in Lug Zabocki (<5).
Outside Croatia
Family name Buzjak (including: Buziak , Buzyak ) is present in 13 countries on three continents. "Buziak " is used by some 100 people in the United States , about 100 in Canada , and small number of people in Poland.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.