Valenčak families are Croats and they are mostly from Zapresic area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Nasice.
Prevalence
About 130 people with faimily name Valenčak live in Croatia today, in 60 households. There were 150 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 7 Croatian counties, in 11 cities and 13 other places, mostly in Zagreb (45), Nasice (15), in Bijela Gorica (10) and Marija Gorica (<10) in Zapresic area, and in Zoljan (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.