In Croatia, Rioža families are generally Croats (from Novigrad area ), very rarely Italians (from Porec ). In the past century, relatively most of Croatian residents bearing this family name were born in Porec area and in Porec. In Milanezi in Porec area every fourth inhabitant had the family name Rioža.
Prevalence
About 20 people with faimily name Rioža live in Croatia today, in 7 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only five naselja i to in Porec (<5), Musalez (<5), in Labinci (<5) and Kastelir (<5) in Novigrad area, and in Vrvari (<5).
Outside Croatia
Family name Rioža (including: Rioza , Herioza and Ryoza ) is present in five countries on three continents. The family name "Rioza " is used by small number of people in the United States.
