In Croatia, Mašek families are almost entirely Croats (from Pleternica ), barely Czechs (from Pozega area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pozega and Zagreb.
Prevalence
About 60 people with faimily name Mašek live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 9 cities and 8 other places, mostly in Trapari (10), Sulkovci (<10), Zagreb (<10), Sveti Ivan Zabno in Krizevci area (<5), and in Vidrenjak in Cazma area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.