In Croatia, Kulko families are Croats (from Krizevci ). In the past century, relatively most of Croatian residents bearing this family name were born in Krizevci and Koprivnica.
Prevalence
About 20 people with faimily name Kulko live in Croatia today, in 7 households. There were 30 of them in the middle of the past century, and their number decreased by 40 percent. They are located in only threee naselja i to in Krizevci (10), Gornja Brckovcina (<10), and in Donja Brckovcina (<5).