In Croatia, Penko families are generally Croats (from Rovinj area ), rarely Italians (from Umag ), and barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Rijeka.
Prevalence
About 50 people with faimily name Penko live in Croatia today, in 20 households. There were 70 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, in 8 cities and threee other places, mostly in Rijeka (20), Pula (20), Valica (<5), Mrgani in Rovinj area (<5), and in Opatija (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1927 in source Emigration Commission Zagreb.