In Croatia, Brainich families are Croats (from Rijeka area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Brainich live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only two Croatian places: in Lubarska in Rijeka area (<5) and Rijeka (<5).
Outside Croatia
Family name Brainich is present in five countries on two continents. The family name "Brainich " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.