Trempetić families are Croats and they are mostly from Ivanic-Grad. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Ivanic-Grad.
Prevalence
About 80 people with faimily name Trempetić live in Croatia today, in 30 households. There were 100 of them in the middle of the past century, and their number decreased by 20 percent. They are located in threee Croatian counties, two cities and 8 other places, mostly in Sesvete (20), Ivanic-Grad (15), Djurdjekovec (15), Zagreb (<10), and in Graberje Ivanicko (<10).
Outside Croatia
Family name Trempetić is present in two countries.
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.