In Croatia, Cernecca families are predominantly Italians (from Rovinj ), rarely Croats (also from Rovinj ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Rovinj and Pula.
Prevalence
About 10 people with faimily name Cernecca live in Croatia today, in 8 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in four Croatian cities only: in Rovinj (<10), Rijeka (<5), Pula (<5), and in Porec (<5).
Outside Croatia
At least four families with this surname emigrated from Croatia to the United States (2) and Switzerland (2). Family name Cernecca is present in 7 countries on four continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.