In Croatia, Brencich families are Italians (from Pula ).
Prevalence
About 10 people with faimily name Brencich live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in one Croatian city only, in Pula (<5).
Outside Croatia
Family name Brencich is present in four countries on three continents.