In Croatia, Radoja families are predominantly Croats (from Drnis area ), rarely Serbs, and very rarely Czechs (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Drnis area and in Split.
Prevalence
About 30 people with faimily name Radoja live in Croatia today, in 17 households. There were 20 of them in the middle of the past century, and their number increased by 80 percent. They are located in 6 Croatian counties, in 7 cities and 5 other places, mostly in Split (<10), Solin (<5), Osijek (<5), Kastel Gomilica (<5), and in Zagreb (<5).