Ružman families are Croats and they are mostly from Prelog. In the past century, relatively most of Croatian residents bearing this family name were born in Prelog and Cakovec.
Prevalence
About 160 people with faimily name Ružman live in Croatia today, in 60 households. There were 120 of them in the middle of the past century, and their number increased by 30 percent. They are located in the most of Croatian counties, in 18 cities and 10 other places, mostly in Prelog (55), Zagreb (20), Valpovo (15), Klostar Podravski in Djurdjevac area (<10), and in Jurovcak in Mursko Sredisce area (<10).
Outside Croatia
Family name Ružman (including: Ruzman , Ruzzaman ) is present in 13 countries on four continents.
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.