Trivanović families are often Serbs and they are mostly from Hrvatska Kostajnica area. According to some sources they are from Trivanovici in Boka Kotorska, rarely Croats. In the past century, relatively most of Croatian residents bearing this family name were born in Hrvatska Kostajnica area and in Zagreb. In Zut in Hrvatska Kostajnica area every third inhabitant had the family name Trivanović.
Prevalence
About 130 people with faimily name Trivanović live in Croatia today, in 70 households. There were 400 of them in the middle of the past century, and their number decreased significantly. They are located in the most of Croatian counties, in 20 cities and 28 other places, mostly in Zagreb (25), Javornik in Hrvatska Kostajnica area (10), Jagodnjak in Beli Manastir area (10), Rijeka (10), and in Sisak (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.