In Croatia, Sinovčević families are Croats (from Pleternica ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica and Zagreb.
Prevalence
About 20 people with faimily name Sinovčević live in Croatia today, in 7 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in only four naselja i to in Brodski Drenovac (<10), Zagreb (<10), Ratkovica (<5), and in Rijeka (<5).
Outside Croatia
Family name Sinovčević is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.