In Croatia, Grželj families are Croats (from Buzet ). In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Pula.
Prevalence
About 20 people with faimily name Grželj live in Croatia today, in 7 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in threee Croatian counties, threee cities and threee other places, mostly in Rijeka (<10), Buzet (<5), Zagreb (<5), Roc (<5), and in Strana (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.