In Croatia, Udžbinac families are Croats (from Grubisno Polje area ). In the past century, relatively most of Croatian residents bearing this family name were born in Grubisno Polje area and in Bjelovar.
Prevalence
About 20 people with faimily name Udžbinac live in Croatia today, in 13 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in threee Croatian counties and 5 other places, mostly in Grubisno Polje (<10), Veliki Grdjevac in Grubisno Polje area (<10), Bjelovar (<5), Domankus in Bjelovar area (<5), and in Koprivnica (<5).
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.