In Croatia, Fostač families are Croats (from Pleternica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica area and in Zagreb.
Prevalence
About 20 people with faimily name Fostač live in Croatia today, in 9 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in only five naselja i to in Zagreb (15), Stupnicki Kuti in Pleternica area (10), Slavonski Brod (<5), Sesvete (<5), and in Pozega (<5).
Outside Croatia
Family name Fostač is present in this form only in Croatia.