In Croatia, Kosa families are Croats (from Daruvar area ). In the past century, relatively most of Croatian residents bearing this family name were born in Daruvar area and in Virovitica. In Mala Klisa in Daruvar area every seventh inhabitant had the family name Kosa.
Prevalence
About 10 people with faimily name Kosa live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only two naselja i to in Virovitica (10) and Podgorje (<5).