Trbara families are Croats and they are mostly from middle Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Gornji Vakuf area) and in Middle Bosnia (Bugojno area). In places Grnica and Rankovići in Middle Bosnia every sixth inhabitant had the family name Trbara.
Prevalence
About 120 people with faimily name Trbara live in Croatia today, in 50 households. They are located in the most of Croatian counties, in 14 cities and 12 other places, mostly in Djakovo (35), Zagreb (20), Piskorevci (<10), Dugo Selo (<10), and in Knin (<10).
Outside Croatia
Family name Trbara is present in 6 countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.