Mamuzić families are almost entirely Croats and they are mostly from Bosnian Posavina , rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Bosanski Samac area) and in Bosanian Posavina (Gradacac area).
Prevalence
About 260 people with faimily name Mamuzić live in Croatia today, in 120 households. There were 100 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 32 cities and 42 other places, mostly in Zagreb (40), Glavice (30), Osijek (20), Zupanja (15), and in Sinj (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.