In Croatia, Zavor families are Croats (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanski Brod area) and in Slavonski Brod.
Prevalence
About 10 people with faimily name Zavor live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Slavonski Brod (15).
Outside Croatia
Family name Zavor is present in five countries on two continents. The family name "Zavor " is used by small number of people in the United States. "Zawor " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.