Tumbri families are Croats and they are mostly from Zagreb. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Bjelovar. In Kupinečki Kraljevec in Zagreb every sixth inhabitant had the family name Tumbri.
About 70 people with faimily name Tumbri live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number increased by 80 percent. They are located in four Croatian counties, threee cities and 14 other places, mostly in Zagreb (15), Brezovica (10), Gornji Stupnik in Samobor area (<10), Gudovac (<10), and in Desprim (<10).