In Croatia, Cerniar families are Croats (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
About 10 people with faimily name Cerniar live in Croatia today, in 7 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only threee naselja i to in Rijeka (<10), Marinici in Rijeka area (<5), and in Zagreb (<5).