In Croatia, Trček families are predominantly Croats (from Ogulin area ), rarely Slovenes (from Slovenia ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Ogulin area.
Prevalence
Only a few people with faimily name Trček live in Croatia today, in three households only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only four naselja i to in Generalski Stol in Ogulin area (<5), Duga Resa (<5), Buzet (<5), and in Johi in Vrbovsko area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1926 in source Emigration Commission Zagreb.