In Croatia, Sintich families are Croats (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Sintich live in Croatia today, in three households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in one Croatian city only, in Rijeka (<5).
Outside Croatia
At least nine families with this surname emigrated from Croatia to the United States (8) and Canada (1). Family name Sintich is present in five countries on two continents. The family name "Sintich " is used by some 100 people in the United States , small number in Italy , and small number of people in Canada.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.