In Croatia, Berek families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Velika Gorica.
Prevalence
About 60 people with faimily name Berek live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number decreased by 10 percent. They are located in four Croatian counties, four cities and 6 other places, mostly in Sisak (30), Topolovac (<10), Velika Kosnica (<10), Drenje Scitarjevsko (<10), and in Obrezina (<5).
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.