In Croatia, Serdoz families are predominantly Italians (from the Island of Losinj ), rarely Croats (from Opatija ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 20 people with faimily name Serdoz live in Croatia today, in 9 households. There were 70 of them in the middle of the past century, and their number decreased significantly. They are located in four Croatian counties, in 6 cities and another small place , mostly in Rijeka (<10), Zagreb (<5), Kastav (<5), Opatija (<5), and in Vrsar in Rovinj area (<5).
Outside Croatia
Family name Serdoz is present in 7 countries on four continents. The family name "Serdoz " is used by some 100 people in Italy , about 60 in Brazil , and small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.