In Croatia, Kera families are almost entirely Croats (from Nin ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Nin and Dubrovnik.
Prevalence
About 50 people with faimily name Kera live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number increased by 40 percent. They are only located in in 7 Croatian cities and four other places, mostly in Dubrovnik (15), Nin (<10), Rijeka (<10), Zagreb (<5), and in Vir in Nin area (<5).