In Croatia, Brnat families are Croats (from Petrinja ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Petrinja.
Prevalence
About 30 people with faimily name Brnat live in Croatia today, in 10 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in threee Croatian counties, threee cities and threee other places, mostly in Zagreb (15), Petrinja (<5), Goricanec (<5), Sesvete (<5), and in Sasinovec (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1938 in source Emigration Commission Zagreb.