In Croatia, Kos-Harjač families are Croats (from Ivanec ). In the past century, relatively most of Croatian residents bearing this family name were born in Ivanec and Zagreb.
Prevalence
About 10 people with faimily name Kos-Harjač live in Croatia today, in 7 households. They are located in only five naselja i to in Ivanec (<5), Prigorec (<5), Cerje Nebojse in Ivanec area (<5), Zagreb (<5), and in Sesvete (<5).
Outside Croatia
Family name Kos-Harjač is present in this form only in Croatia.