Šestak families are Croats and they are mostly from Glina area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and Koprivnica. In Šestak Brdo in Glina area nearly every inhabitant had the family name Šestak.
Prevalence
About 1000 people with faimily name Šestak live in Croatia today, in 410 households. There were 1200 of them in the middle of the past century, and their number decreased by 10 percent. They are located in almost all Croatian counties, in 42 cities and 112 other places, mostly in Zagreb (120), Varazdin (75), Koprivnica (75), Sestak Brdo in Glina area (60), and in Gola in Djurdjevac area (50).
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.