Razum families are Croats and they are mostly from Samobor. According to some sources they are from Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and Zagreb. In Konšćica in Samobor every third inhabitant had the family name Razum.
Prevalence
About 630 people with faimily name Razum live in Croatia today, in 220 households. There were 460 of them in the middle of the past century, and their number increased by 40 percent. They are located in the most of Croatian counties, in 22 cities and 51 other places, mostly in Zagreb (140), Samobor (90), Sveti Martin Pod Okicem (60), Konscica (45), and in Sesvete (25).
Outside Croatia
Family name Razum is present in 21 countries worldwide. The family name "Razum " is used by some 400 people in Russian Federation , about 200 in Germany , and some 100 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1683 in source Catholic Church Parish Records.