In Croatia, Herga families are predominantly Croats (from Zagreb ), rarely Serbs.
Prevalence
Only a few people with faimily name Herga live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Zagreb (<5).
Outside Croatia
Family name Herga (including: Herghea , Cherga and Therga ) is present in 21 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.