In Croatia, Pupak families are generally Croats (from Lipik ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Lipik and Zagreb.
Prevalence
About 20 people with faimily name Pupak live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in three Croatian cities only: in Zagreb (<10), Marino Selo (<10), and in Pakrac (<5).