Černeka families are almost entirely Croats and they are mostly from Buzet , rarely Italians. In the past century, relatively most of Croatian residents bearing this family name were born in Buzet and in Slovenia. In places Medveje and Sovinjak in Buzet every second inhabitant had the family name Černeka.
Prevalence
About 200 people with faimily name Černeka live in Croatia today, in 90 households. There were 110 of them in the middle of the past century, and their number increased by 80 percent. They are only located in in 11 Croatian cities and 27 other places, mostly in Rijeka (25), Buzet (20), Pula (20), Sveti Martin (15), and in Medveje (15).
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.