Crnogaj families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Krapina. In Hlevnica in Krapina area every eighth inhabitant had the family name Crnogaj.
Prevalence
About 230 people with faimily name Crnogaj live in Croatia today, in 90 households. There were 110 of them in the middle of the past century, and their number doubled. They are located in 9 Croatian counties, in 18 cities and 18 other places, mostly in Zagreb (75), Gat (30), Valpovo (15), Zagora (15), and in Krapina (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.