In Croatia, Kohlmann families are Croats (from Karlovac ). In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac.
Prevalence
Only a few people with faimily name Kohlmann live in Croatia today, in one household only. They are located in only one small Croatian place, in Tuskani (<5).
Outside Croatia
Family name Kohlmann is present in 30 countries worldwide. The family name "Kohlmann " is used by some 7000 people in Germany , about 1000 in the United States , and some 600 people in Brazil.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.