In Croatia, Subjak families are generally Croats (from Rovinj area ), very rarely Slovaks (from Nasice area ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Nasice area and in Nasice.
Prevalence
About 30 people with faimily name Subjak live in Croatia today, in 10 households. There were 40 of them in the middle of the past century, and their number decreased by 30 percent. They are located in threee Croatian counties, four cities and 6 other places, mostly in Nasice (<10), Koska in Nasice area (<10), Bale in Rovinj area (<10), Osijek (<5), and in Rovinj (<5).