Rezo families are Croats and they are mostly from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Posusje area) and in Pozega. In Sutina in Herzegovina every fifth inhabitant had the family name Rezo.
Prevalence
About 330 people with faimily name Rezo live in Croatia today, in 120 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 25 cities and 27 other places, mostly in Zagreb (110), Sesvete (35), Pleternica (30), Tominovac in Orahovica area (15), and in Split (10).
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.