In Croatia, Herco families are Croats (from Dubrovnik area ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik.
Prevalence
About 10 people with faimily name Herco live in Croatia today, in three 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 Zagreb (<10) and Kupari in Dubrovnik area (<5).