Kero families are Croats and they are mostly from Zadar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and in Zadar area. In Gornje Planjane in Drnis area every tenth inhabitant had the family name Kero.
Prevalence
About 330 people with faimily name Kero live in Croatia today, in 130 households. There were 180 of them in the middle of the past century, and their number increased by 90 percent. They are located in 9 Croatian counties, in 18 cities and 12 other places, mostly in Bibinje in Zadar area (140), Split (80), Zagreb (15), Knin (15), and in Sibenik (15).
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.