In Croatia, Tadejević families are Croats (from Delnice area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and in Delnice area.
Prevalence
About 70 people with faimily name Tadejević live in Croatia today, in 30 households. There were 80 of them in the middle of the past century, and their number decreased by 20 percent. They are located in four Croatian counties, in 8 cities and 9 other places, mostly in Sunger in Delnice area (15), Rijeka (15), Mrkopalj in Delnice area (15), Split (<5), and in Gospic (<5).
Outside Croatia
At least seven families with this surname emigrated from Croatia to the United States (6) and Canada (1). Family name Tadejević is present in three countries on two continents. The family name "Tadejevic " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.