Krželj families are Croats and they are mostly from Omis area. In the past century, relatively most of Croatian residents bearing this family name were born in Western Bosnia (Livno area) and in Split.
Prevalence
About 300 people with faimily name Krželj live in Croatia today, in 130 households. There were 180 of them in the middle of the past century, and their number increased by 70 percent. They are located in 7 Croatian counties, in 13 cities and 19 other places, mostly in Split (95), Zadvarje in Omis area (40), Zagreb (40), Podstrana in Solin area (15), and in Zezevica in Omis area (15).
Outside Croatia
Family name Krželj (including: Krzelj , Krzeli ) is present in 12 countries on four continents.
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.