In Croatia, Bocak families are Croats (from Djurdjevac area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Djurdjevac. In Novaki Ravenski in Krizevci every twentieth inhabitant had the family name Bocak.
Prevalence
About 30 people with faimily name Bocak live in Croatia today, in 17 households. There were 60 of them in the middle of the past century, and their number halved. They are located in 6 Croatian counties, in 6 cities and four other places, mostly in Zagreb (<10), Djurdjevac (<10), Stubicke Toplice in Oroslavje area (<5), Virje in Djurdjevac area (<5), and in Prikraj Krizevacki (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1683 in source Catholic Church Parish Records.