In Croatia, Radomiljac families are almost entirely Croats (from Vrgorac ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Vrgorac and Makarska.
Prevalence
About 30 people with faimily name Radomiljac live in Croatia today, in 13 households. There were 40 of them in the middle of the past century, and their number decreased by 20 percent. They are located in two Croatian counties, four cities and threee other places, mostly in Ravca (10), Makarska (<10), in Janjina (<10) and Orebic (<5) on the Peljesac peninsula, and in Solin (<5).
Outside Croatia
Family name Radomiljac is present in two countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1929 in source Emigration Commission Zagreb.