Efendić families are usually Croats and they are mostly from Sinj , rarely Bosniaks. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and Split.
Prevalence
About 120 people with faimily name Efendić live in Croatia today, in 50 households. There were 90 of them in the middle of the past century, and their number increased by 20 percent. They are located in 10 Croatian counties, in 14 cities and 9 other places, mostly in Obrovac Sinjski (45), Split (30), Zagreb (20), Sinj (15), and in Slavonski Brod (<10).
Outside Croatia
Family name Efendić is present in 17 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.