In Croatia, Rosner families are generally Croats (from Ludbreg area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Ludbreg area.
Prevalence
About 10 people with faimily name Rosner live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number halved. They are located in three Croatian cities only: in Varazdin (<10), Osijek (<10), and in Zagreb (<5).