In Croatia, Gavljak families are mainly Slovaks (from Djakovo area ), equally Croats (also from Djakovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Djakovo area and in Djakovo.
Prevalence
About 30 people with faimily name Gavljak live in Croatia today, in 12 households. There were 20 of them in the middle of the past century, and their number increased by 20 percent. They are located in only threee naselja i to in Josipovac Punitovacki (<5) and Punitovci (<5) in Djakovo area, and in Djakovo (<5).
Outside Croatia
Family name Gavljak is present in five countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.