In Croatia, Lavrnja families are mainly Serbs, less frequently Croats (from Sisak ), and very rarely Poles (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Otocac and Sisak.
Prevalence
About 60 people with faimily name Lavrnja live in Croatia today, in 30 households. There were 160 of them in the middle of the past century, and their number decreased significantly. They are located in 8 Croatian counties, in 6 cities and 6 other places, mostly in Sisak (10), Hrvatsko Polje (10), Rijeka (<10), Otocac (<10), and in Zagreb (<10).
Outside Croatia
Family name Lavrnja is present in 14 countries worldwide. "Lavernia " is used by some 200 people in Spain , about 100 in the United States , and small number of people in Venezuela.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.