Žaja families are Croats and they are mostly from Trogir area. According to some sources they are from Arzano. In the past century, relatively most of Croatian residents bearing this family name were born in Trogir area and in Omis area. In Vinovac in Trogir area every second inhabitant had the family name Žaja.
Prevalence
About 910 people with faimily name Žaja live in Croatia today, in 390 households. There were 560 of them in the middle of the past century, and their number increased by 60 percent. They are located in almost all Croatian counties, in 36 cities and 48 other places, mostly in Split (150), Zagreb (120), Trogir (90), Arzano in Omis area (60), and in Vinovac in Trogir area (55).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 2007 in source Encyclopaedia of Croatian Surnames.