In Croatia, Mirtić families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Hrvatska Kostajnica area.
Prevalence
Only a few people with faimily name Mirtić live in Croatia today, in five households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only two naselja i to in Zagreb (<10) and Lucko (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.