In Croatia, Lujak families are Croats (from Dubrovnik ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and Zagreb.
Prevalence
About 40 people with faimily name Lujak live in Croatia today, in 14 households. There were 30 of them in the middle of the past century, and their number increased by 40 percent. They are located in threee Croatian counties, threee cities and threee other places, mostly in Dubrovnik (30), Prijevor (<5), Zagreb (<5), Split (<5), and in Kolocep (<5).
Outside Croatia
Family name Lujak (including: Lujack , Luyak ) is present in 6 countries on three continents. "Lujack " 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.