In Croatia, Mrkailo families are predominantly Croats (from Obrovac area ), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Obrovac area and in Zagreb.
Prevalence
Only a few people with faimily name Mrkailo live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian cities only, in Zagreb (<10) and Velika Gorica (<10).