In Croatia, Bak families are generally Croats (from Vinkovci ), very rarely Hungarians (from Osijek area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and in Osijek area.
Prevalence
About 10 people with faimily name Bak live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 6 cities and another small place , mostly in Vinkovci (<10), Sibenik (<5), Bilje in Osijek area (<5), Zagreb (<5), and in Samobor (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1929 in source Emigration Commission Zagreb.