Boltek families are Croats and they are mostly from Ivanec area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Donja Stubica area.
Prevalence
About 200 people with faimily name Boltek live in Croatia today, in 90 households. There were 270 of them in the middle of the past century, and their number decreased by 30 percent. They are located in the most of Croatian counties, in 10 cities and 15 other places, mostly in Zagreb (60), Vinica in Ivanec area (45), Sveti Matej in Donja Stubica area (45), Sesvete (25), and in Kutina (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.