Trnčić families are Croats and they are mostly from Ivanic-Grad area. In the past century, relatively most of Croatian residents bearing this family name were born in Ivanic-Grad area and in Zagreb. In Sobočani in Ivanic-Grad area every eighth inhabitant had the family name Trnčić.
Prevalence
About 70 people with faimily name Trnčić live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 50 percent. They are located in four Croatian counties, threee cities and 9 other places, mostly in Klostar Ivanic in Ivanic-Grad area (25), Graberje Ivanicko (10), Ivanic-Grad (<10), Zagreb (<10), and in Sobocani in Ivanic-Grad area (<10).
Outside Croatia
Family name Trnčić is present in 8 countries on two continents. The family name "Trncic " is used by small number of people in Canada and small number 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.
