Prostran families are mainly Serbs and they are mostly from Zadar area , whereas often Croats (from Zadar). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and in Zadar area. In Smoković in Zadar area every fifth inhabitant had the family name Prostran.
Prevalence
About 170 people with faimily name Prostran live in Croatia today, in 90 households. There were 260 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 13 cities and 10 other places, mostly in Zadar (75), Smokovic in Zadar area (25), Rijeka (15), Zagreb (<10), and in Vukovar (<10).
Outside Croatia
Family name Prostran is present in 10 countries on four continents. The family name "Prostran " is used by some 60 people in Canada , small number in the United States , and small number of people in Australia.
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.