Biuk families are Croats and they are mostly from Vrlika. In the past century, relatively most of Croatian residents bearing this family name were born in Vrlika and Split.
Prevalence
About 380 people with faimily name Biuk live in Croatia today, in 150 households. There were 140 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 23 cities and 22 other places, mostly in Split (145), Solin (50), Zagreb (40), Vinalic (25), and in Osijek (25).
Outside Croatia
Family name Biuk (including: Byuk , Biuc and Biuck ) is present in 18 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.