Maružin families are Croats and they are mostly from Rovinj area. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and in Rovinj area. In Maružini in Rovinj area every second inhabitant had the family name Maružin.
Prevalence
About 90 people with faimily name Maružin live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number decreased by 10 percent. They are located in two Croatian counties, in 7 cities and 7 other places, mostly in Maruzini in Rovinj area (30), Pula (20), Rovinj (20), Veli Losinj on the Island of Losinj (<10), and in Burici in Rovinj area (<10).
Outside Croatia
Family name Maružin is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.