Bojko families are Croats and they are mostly from Koprivnica area. In the past century, relatively most of Croatian residents bearing this family name were born in Novska and Koprivnica. In Gajevi in Bosnian Krajina every tenth inhabitant had the family name Bojko.
Prevalence
About 120 people with faimily name Bojko live in Croatia today, in 50 households. There were 70 of them in the middle of the past century, and their number increased by 60 percent. They are located in the most of Croatian counties, in 14 cities and 16 other places, mostly in Zagreb (20), Slavonski Brod (10), Krizevci (10), Petrovci in Vukovar area (10), and in Sibinj in Slavonski Brod area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1929 in source Emigration Commission Zagreb.