In Croatia, Semak families are Croats (from Slatina area ). In the past century, relatively most of Croatian residents bearing this family name were born in Slatina and in Bosnian Krajina (Prnjavor area).
Prevalence
About 10 people with faimily name Semak live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Slatina (<10), Slavonski Brod (<5), Sopjanska Greda in Slatina area (<5), and in Knin (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.