In Croatia, Sincich families are Italians (from Pula ).
Prevalence
About 20 people with faimily name Sincich live in Croatia today, in one household only. They are located in one Croatian city only, in Pula (<5).
Outside Croatia
Family name Sincich is present in 8 countries on four continents. The family name "Sincich " is used by some 100 people in Argentina , about 90 in the United States , and some 90 people in Italy.
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.