In Croatia, Mrdjan families are predominantly Croats, rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Srijem, Vojvodina.
Prevalence
Only a few people with faimily name Mrdjan live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian counties, in one city and another small place , mostly in Slavonski Brod (<5) and Stari Jankovci in Vinkovci area (<5).