In Croatia, Sunjka families are Croats (from Sibenik ). In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik.
Prevalence
Only a few people with faimily name Sunjka live in Croatia today, in three households only. They are located in three Croatian cities only: in Brodarica (<5), Zagreb (<5), and in Split (<5).
Outside Croatia
Family name Sunjka is present in 7 countries on four continents. The family name "Sunjka " is used by small number of people in the United States.