Dujam families are Croats and they are mostly from Duga Resa area. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and in Duga Resa area.
Prevalence
About 100 people with faimily name Dujam live in Croatia today, in 50 households. There were 50 of them in the middle of the past century, and their number doubled. They are located in 6 Croatian counties, in 6 cities and 13 other places, mostly in Duga Resa (30), Cerovac Barilovicki in Duga Resa area (25), Karlovac (20), Zagreb (15), and in Cabuna in Virovitica area (<10).
Outside Croatia
Family name Dujam is present in two countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.