In Croatia, Sincovich families are mainly Italians (from Umag ), less frequently Croats (from Labin ). In the past century, relatively most of Croatian residents bearing this family name were born in Labin and in Buje area.
Prevalence
Only a few people with faimily name Sincovich live in Croatia today, in five households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only threee Croatian places: in Cepljani (<5), Petrovija (<5), and in Djuba (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.