Trumbetaš families are Croats and they are mostly from Velika Gorica. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Velika Gorica.
Prevalence
About 90 people with faimily name Trumbetaš live in Croatia today, in 40 households. There were 110 of them in the middle of the past century, and their number decreased by 20 percent. They are only located in four Croatian cities and 9 other places, mostly in Donja Lomnica (45), Velika Mlaka (25), Velika Gorica (<10), Zagreb (<10), and in Busevec (<5).
Outside Croatia
Family name Trumbetaš is present in 6 countries on four continents. The family name "Trumbetas " is used by small number of people in Russian Federation and small number in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.