Sili families are Croats and they are mostly from Varazdin area. In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Zagreb.
Prevalence
About 130 people with faimily name Sili live in Croatia today, in 50 households. There were 110 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 13 cities and 18 other places, mostly in Zagreb (20), Osijek (15), Gornja Stubica in Donja Stubica area (10), Nasice (<10), and in Tenja (<10).
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.