In Croatia, Cir families are Croats (from Vukovar ). In the past century, relatively most of Croatian residents bearing this family name were born in Vukovar.
Prevalence
Only a few people with faimily name Cir live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Vukovar (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1924 in source Emigration Commission Zagreb.