Mirt families are Croats and they are mostly from Donja Stubica. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Donja Stubica. In Hruševec in Donja Stubica every ninth inhabitant had the family name Mirt.
Prevalence
About 440 people with faimily name Mirt live in Croatia today, in 180 households. There were 370 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 19 cities and 38 other places, mostly in Zagreb (85), Donja Stubica (55), Hrusevec (40), Prigorje Brdovecko in Zapresic area (25), and in Oroslavje (25).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.