Tršinski families are Croats and they are mostly from Zabok. In the past century, relatively most of Croatian residents bearing this family name were born in Zabok and Zagreb.
Prevalence
About 100 people with faimily name Tršinski live in Croatia today, in 50 households. There were 140 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 6 Croatian counties, in 8 cities and two other places, mostly in Zabok (80), Zagreb (20), Pula (<10), Pavlovec Zabocki (<5), and in Varazdin (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.