In Croatia, Radjen families are Croats by relative majority (from Rovinj ), equally Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanska Gradiska area). In Vilusi in Bosanian Posavina every fourtieth inhabitant had the family name Radjen.
Prevalence
Only a few people with faimily name Radjen live in Croatia today, in one household only. They are located in two Croatian cities only, in Zagreb (<10) and Rovinj (<5).
Outside Croatia
Family name Radjen is present in 12 countries on four continents. The family name "Radjen " is used by some 80 people in Indonesia and small number in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.