In Croatia, Bučak families are Croats (from Zupanja ). In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Vinkovci.
Prevalence
Only a few people with faimily name Bučak live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are only located in two Croatian cities and another small place , mostly in Vinkovci (<5), Zupanja (<5), and in Cerna in Zupanja area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.