Kosina families are often Croats and they are mostly from Pozega area , less frequently Czechs. In the past century, relatively most of Croatian residents bearing this family name were born in Kutina and Zagreb. In Kaptol in Pozega area every fiftieth inhabitant had the family name Kosina.
Prevalence
About 90 people with faimily name Kosina live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 12 cities and 11 other places, mostly in Zagreb (15), Kutina (<10), Osijek (<10), and in Velika (<10) and Kaptol (<10) in Pozega area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.