Bulum families are Croats and they are mostly from Opuzen area. In the past century, relatively most of Croatian residents bearing this family name were born in Metkovic and in Opuzen area. In Bijeli Vir in Opuzen area every ninth inhabitant had the family name Bulum.
Prevalence
About 190 people with faimily name Bulum live in Croatia today, in 80 households. There were 80 of them in the middle of the past century, and their number more than doubled. They are located in 6 Croatian counties, in 10 cities and 13 other places, mostly in Metkovic (100), Zagreb (35), Bijeli Vir in Opuzen area (10), Dubrovnik (10), and in Opuzen (<10).
Outside Croatia
Family name Bulum is present in 15 countries worldwide. "Bullum " 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.