Petković families are predominantly Croats and they are mostly from the Island of Korcula. According to some sources they are from Varazdin, Novog Marofa or Vrpolje near Sibenik, less frequently Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Zagreb. In Vrpolje in Sibenik every third inhabitant had the family name Petković.
Prevalence
About 2700 people with faimily name Petković live in Croatia today, in 1200 households. There were 2200 of them in the middle of the past century, and their number increased by 20 percent. They are located in all Croatian counties, in 84 cities and 244 other places, mostly in Zagreb (440), Sibenik (205), Blato on the Island of Korcula (120), Rijeka (110), and in Pula (90).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over seventy times, the first time 1689 in source Catholic Church Parish Records.