In Croatia, Cillar families are Croats (from Varazdin ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin.
Prevalence
Only a few people with faimily name Cillar live in Croatia today, in one household only. They are located in one Croatian city only, in Varazdin (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.