In Croatia, Treščin families are Croats (from Koprivnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Koprivnica area and in Koprivnica.
Prevalence
About 10 people with faimily name Treščin live in Croatia today, in four households only. There were 10 of them in the middle of the past century, and their number remains constant. They are only located in in one Croatian city and another small place , mostly in Koprivnica (<5) and Djelekovec in Koprivnica area (<5).