In Croatia, Popratnjak families are Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Knin area and in Knin.
Prevalence
About 10 people with faimily name Popratnjak live in Croatia today, in 8 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Uzdolje in Knin area (10), Kovacic (<5), Knin (<5), and in Biskupija in Knin area (<5).
Outside Croatia
Family name Popratnjak is present in 6 countries on three continents.