In Croatia, Bočak families are almost entirely Croats (from Zapresic area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Slovenia.
Prevalence
About 40 people with faimily name Bočak live in Croatia today, in 19 households. There were 40 of them in the middle of the past century, and their number remains constant. They are only located in in 6 Croatian cities and four other places, mostly in Zagreb (10), Vinkovci (<10), Prigorje Brdovecko in Zapresic area (<10), Zupanja (<5), and in Brdovec in Zapresic area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.