In Croatia, Bubonja families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Knin.
Prevalence
About 20 people with faimily name Bubonja live in Croatia today, in 8 households. There were 70 of them in the middle of the past century, and their number decreased significantly. They are located in only threee naselja i to in Golubic (<10), Knin (<10), and in Rijeka (<5).