In Croatia, Dobrovoljac families are Croats (from Duga Resa area ). In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica and Karlovac.
Prevalence
About 10 people with faimily name Dobrovoljac live in Croatia today, in 7 households. There were 20 of them in the middle of the past century, and their number halved. They are located in three Croatian cities only: in Karlovac (<10), Ludbreg (<5), and in Koprivnica (<5).
Outside Croatia
Family name Dobrovoljac is present in three countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.