Kadoić families are Croats and they are mostly from Zlatar. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Zlatar.
Prevalence
About 300 people with faimily name Kadoić live in Croatia today, in 140 households. There were 270 of them in the middle of the past century, and their number increased by 10 percent. They are located in the most of Croatian counties, in 17 cities and 38 other places, mostly in Zagreb (105), Donja Batina (50), Zlatar (15), Vinkovci (10), and in Zitomir (10).
Outside Croatia
Family name Kadoić (including: Kadoic , Kadoich ) is present in 10 countries on three continents. "Kadoich " 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 over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.