In Croatia, Ridjan families are Croats (from Serbia ). In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod and in Serbia.
Prevalence
About 10 people with faimily name Ridjan live in Croatia today, in four households only. They are located in only threee naselja i to in Belovar (<5), Trogir (<5), and in Zagreb (<5).
Outside Croatia
Family name Ridjan (including: Ridian , Ridlyan ) is present in 8 countries on four continents.