Žerjav families are usually Croats and they are mostly from Prelog area , rarely Slovenes (from Slovenia ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Cakovec.
Prevalence
About 380 people with faimily name Žerjav live in Croatia today, in 160 households. There were 300 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 16 cities and 36 other places, mostly in Zagreb (105), Cakovec (70), Dekanovec in Prelog area (35), Darda in Osijek area (25), and in Velika Gorica (10).
Outside Croatia
Family name Žerjav (including: Zerjav , Zeryav ) is present in 8 countries on three continents. The family name "Zerjav " is used by some 200 people in the United States and small number in Canada.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1926 in source Emigration Commission Zagreb.