In Croatia, Buač families are predominantly Serbs, rarely Croats (from Cazma ). In the past century, relatively most of Croatian residents bearing this family name were born in Knin area and in Bjelovar.
Prevalence
About 30 people with faimily name Buač live in Croatia today, in 17 households. There were 60 of them in the middle of the past century, and their number halved. They are located and 5 other Croatian places, mostly in Orlic in Knin area (15), Gornji Draganec (<10), Zagreb (<10), Vagovina (<5), and in Zvjerinac in Knin area (<5).
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.