In Croatia, Tumbas families are predominantly Croats (from Backa, Vojvodina ), rarely Serbs, and barely Montenegrins (from Porec ). In the past century, relatively most of Croatian residents bearing this family name were born in Backa, Vojvodina and in Kutina.
Prevalence
About 60 people with faimily name Tumbas live in Croatia today, in 30 households. They are located in the most of Croatian counties, in 13 cities and 7 other places, mostly in Osijek (10), Zagreb (<10), Rijeka (<10), Kutina (<10), and in Karlovac (<5).
Outside Croatia
Family name Tumbas is present in 14 countries worldwide. The family name "Tumbas " is used by some 100 people in Indonesia , about 100 in Turkey , and some 80 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.