In Croatia, Groznik families are predominantly Croats (from Tuzla Region (Bosnia) ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Tuzla Region, Bosnia (Tuzla area).
Prevalence
Only a few people with faimily name Groznik live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian cities only, in Zagreb (<5) and Visnjevac (<5).
Outside Croatia
Family name Groznik is present in 19 countries worldwide. The family name "Groznik " is used by small number of people in the United States , small number in Australia , and small number of people in Argentina.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1933 in source Emigration Commission Zagreb.