Trbušić families are Croats and they are mostly from Zabok area. According to some sources sa otoka Hvara. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zabok area.
Prevalence
About 200 people with faimily name Trbušić live in Croatia today, in 80 households. There were 270 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 10 cities and 15 other places, mostly in Zagreb (95), Karlovac (25), Radakovo in Zabok area (20), Voloder in Kutina area (15), and in Kapelski Vrh in Zabok area (10).
Outside Croatia
Family name Trbušić (including: Trbusic , Trbuscic ) is present in three countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.