In Croatia, Vlach families are Czechs by relative majority (from Karlovac ), equally Italians (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
Only a few people with faimily name Vlach live in Croatia today, in two households only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Rijeka (<5) and Karlovac (<5).
Outside Croatia
Family name Vlach is present in 26 countries worldwide. The family name "Vlach " is used by some 3000 people in Czech Republic , about 1000 in the United States , and some 400 people in Ethiopia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1672 in source Catholic Church Parish Records.