In Croatia, Tvrdinić families are almost entirely Croats (from Otocac ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Otocac.
Prevalence
About 50 people with faimily name Tvrdinić live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 7 Croatian counties, in 6 cities and four other places, mostly in Karlovac (25), Zagreb (<10), Covici (<10), Otocac (<5), and in Viskovo in Rijeka area (<5).
Outside Croatia
Family name Tvrdinić is present in two countries on two continents.
