Trubelja families are Croats and they are mostly from Novi Marof. In the past century, relatively most of Croatian residents bearing this family name were born in Novi Marof and Varazdin.
Prevalence
About 110 people with faimily name Trubelja live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number increased by 10 percent. They are located in the most of Croatian counties, in 10 cities and 10 other places, mostly in Novi Marof (30), Presecno (10), Sesvete (<10), Koprivnica (<10), and in Zagreb (<10).
Outside Croatia
Family name Trubelja is present in four countries on two continents. The family name "Trubelja " is used by few people in the United States.
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.