In Croatia, Halajko families are Croats (from Pleternica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica area and in Rijeka.
Prevalence
About 30 people with faimily name Halajko live in Croatia today, in 11 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in only five Croatian places: in Kutina (<10), Slobodnica in Slavonski Brod area (<10), Slavonski Brod (<5), Kaniza in Pleternica area (<5), and in Jadranovo (<5).