Crepulja families are Croats and they are mostly from middle Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Kakanj area) and in Middle Bosnia (Vares area).
Prevalence
About 170 people with faimily name Crepulja live in Croatia today, in 60 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in the most of Croatian counties, in 20 cities and 26 other places, mostly in Gracac in Knin area (30), Poljana (20), Pula (15), Rijeka (15), and in Plaski in Slunj area (<10).
Outside Croatia
Family name Crepulja is present in 11 countries on three continents. "Crepulia " 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 2007 in source Encyclopaedia of Croatian Surnames.