Ćulum families are predominantly Croats and they are mostly from Knin area. According to some sources they are from Donji Muc (Split), rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Ploce and in Knin area. In Donji Muć in Sinj area every fiftieth inhabitant had the family name Ćulum.
Prevalence
About 110 people with faimily name Ćulum live in Croatia today, in 60 households. There were 60 of them in the middle of the past century, and their number increased by 90 percent. They are located in the most of Croatian counties, in 17 cities and 10 other places, mostly in Rijeka (20), Split (15), Donji Muc in Sinj area (15), Zagreb (10), and in Peracko Blato (10).
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.