In Croatia, Dujlo families are generally Croats (from Duga Resa area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area) and in Zagreb. In Cerici in Banja Luka Region (Bosnia) every fiftieth inhabitant had the family name Dujlo.
Prevalence
About 20 people with faimily name Dujlo live in Croatia today, in 8 households. They are located and two other Croatian places, mostly in Zagreb (<10), Vojnic in Duga Resa area (<5), Zadar (<5), Graberje Ivanicko (<5), and in Mreznicke Poljice (<5).
Outside Croatia
Family name Dujlo (including: Duilo , Duylo ) is present in 6 countries on four continents. "Duylo " is used by few 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 2007 in source Encyclopaedia of Croatian Surnames.