Maslak families are Croats and they are mostly from Jastrebarsko area. In the past century, relatively most of Croatian residents bearing this family name were born in Jastrebarsko area and in Nasice. In Desno Sredičko in Jastrebarsko area every ninth inhabitant had the family name Maslak.
Prevalence
About 90 people with faimily name Maslak live in Croatia today, in 40 households. There were 50 of them in the middle of the past century, and their number increased by 100 percent. They are located in 10 Croatian counties, in 11 cities and 8 other places, mostly in Desno Sredicko in Jastrebarsko area (25), Osijek (15), Zagreb (10), Rijeka (<10), and in Nasice (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1938 in source Emigration Commission Zagreb.