Oroz families are mainly Croats and they are mostly from middle Bosnia , barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Derventa area) and in East Herzegovina (Gacko area). In places Djedov Do and Gojevići in Middle Bosnia every third inhabitant had the family name Oroz.
Prevalence
About 420 people with faimily name Oroz live in Croatia today, in 170 households. There were 90 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 28 cities and 31 other places, mostly in Slavonski Brod (115), Zagreb (80), Pula (35), Darda in Osijek area (30), and in Petrinja (15).
Outside Croatia
Family name Oroz (including: Horoz , Orozzo and Horroz ) is present in 46 countries worldwide. "Orozzo " is used by small number of 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 1691 in source Catholic Church Parish Records.