In Croatia, Treger families are predominantly Croats (from Pozega area ), rarely Slovaks (also from Pozega area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Pozega area.
Prevalence
About 20 people with faimily name Treger live in Croatia today, in 11 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in threee Croatian counties, four cities and four other places, mostly in Cerovac in Pozega area (<10), Zagreb (<10), Kaptol in Pozega area (<5), Bektez in Orahovica area (<5), and in Osijek (<5).