In the past century, relatively most of Croatian residents bearing this family name were born in Romania, Bosnia (Sokolac area). In Banja Lučica in Romania (Bosnia) nearly every inhabitant had the family name Kulo.
Prevalence
Only a few people with faimily name Kulo live in Croatia today, in one household only. They are located in one Croatian city only, in Zagreb (<5).
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.