In Croatia, Osmann families are Croats (from Banja Luka Region (Bosnia) ). In the past century, relatively most of Croatian residents bearing this family name were born in Banja Luka Region, Bosnia (Banja Luka area).
Prevalence
Only a few people with faimily name Osmann live in Croatia today, in two households only. They are located in only two Croatian places: in Zagreb (<5) and Kostresi Saski in Hrvatska Kostajnica area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.