In Croatia, Teršić families are Croats (from Zadar ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar.
Prevalence
Only a few people with faimily name Teršić live in Croatia today, in three households only. They are located in two Croatian cities only, in Zadar (<5) and Pula (<5).
Outside Croatia
Family name Teršić (including: Tersic , Tersich ) is present in three countries on two continents. "Tersich " is used by few people in the United States.