In Croatia, Johum families are predominantly Croats (from Osijek area ), rarely Germans (from Banat, Vojvodina ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Osijek area.
Prevalence
About 20 people with faimily name Johum live in Croatia today, in 6 households. They are located in only four naselja i to in Ivanovac (15) and Antunovac (<10) in Osijek area, Tenja (<10), and in Osijek (<5).