Mraz families are Croats and they are mostly from Slavonski Brod area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Varazdin.
Prevalence
About 370 people with faimily name Mraz live in Croatia today, in 160 households. There were 470 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 22 cities and 54 other places, mostly in Zagreb (70), Trnovec in Varazdin area (20), Garcin in Slavonski Brod area (20), Sveti Kriz Zacretje in Zabok area (15), and in Bjelovar (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1679 in source Catholic Church Parish Records.