Duplica families are Croats and they are mostly from Dubrovnik. In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and in Dubrovnik area. In Plat in Dubrovnik area nearly every inhabitant had the family name Duplica.
Prevalence
About 50 people with faimily name Duplica live in Croatia today, in 18 households. There were 40 of them in the middle of the past century, and their number increased by 10 percent. They are located in two Croatian counties, two cities and 5 other places, mostly in Plat (25), Mlini (<10), Cavtat (<5) and Soline (<5) in Dubrovnik area, and in Dubrovnik (<5).
Outside Croatia
Family name Duplica is present in 6 countries on three continents. The family name "Duplica " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.
