In Croatia, Sember families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosnian Krajina (Srbac area). In Bajinci in Bosnian Krajina every twentieth inhabitant had the family name Sember.
Prevalence
Only a few people with faimily name Sember live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only one small Croatian place, in Tenja (<5).