Joha families are Croats and they are mostly from Karlovac. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Nova Gradiska. In Slunjski Moravci in Karlovac every third inhabitant had the family name Joha.
Prevalence
About 110 people with faimily name Joha live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 7 cities and 10 other places, mostly in Karlovac (40), Slunjski Moravci (25), Zagreb (10), Nova Gradiska (<10), and in Banska Selnica (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.