In Croatia, Trnko families are predominantly Croats (from Beli Manastir area ), rarely Hungarians (from Beli Manastir area ). In the past century, relatively most of Croatian residents bearing this family name were born in Backa, Vojvodina.
Prevalence
Only a few people with faimily name Trnko live in Croatia today, in three households only. They are located in only two naselja i to in Batina (<5) and Suza (<5) in Beli Manastir area.
Outside Croatia
Family name Trnko is present in four countries on two continents.