In Croatia, Serbus families are Croats (from Pula area ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula.
Prevalence
About 10 people with faimily name Serbus live in Croatia today, in three households only. They are located in only two Croatian places: in Jadreski in Pula area (<10) and Pula (<5).
Outside Croatia
Family name Serbus is present in five countries on two continents. The family name "Serbus " is used by some 500 people in the United States , about 100 in Czech Republic , and small number of people in Germany.