In Croatia, Mirth families are predominantly Croats (from Nova Gradiska area ), rarely Italians (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Nova Gradiska area and in Rijeka.
Prevalence
Only a few people with faimily name Mirth live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Rijeka (<10).
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.