Erkapić families are Croats and they are mostly from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Grude area) and in Osijek.
Prevalence
About 100 people with faimily name Erkapić live in Croatia today, in 40 households. They are only located in in 7 Croatian cities and 12 other places, mostly in Osijek (25), Split (20), Zagreb (10), Cepin in Osijek area (10), and in Prisoje in Sinj area (<10).
Outside Croatia
Family name Erkapić is present in five countries on two continents. The family name "Erkapic " is used by small number of 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 2007 in source Encyclopaedia of Croatian Surnames.