In Croatia, Trconić families are Croats (from Zupanja area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zupanja area and in Bjelovar.
Prevalence
About 30 people with faimily name Trconić live in Croatia today, in 19 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in 6 Croatian counties, in 6 cities and another small place , mostly in Strosinci in Zupanja area (10), Osijek (10), Zagreb (<10), Bjelovar (<5), and in Rijeka (<5).