In Croatia, Portner families are almost entirely Croats (from Pozega area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Srijem, Vojvodina and in Pozega area.
Prevalence
About 30 people with faimily name Portner live in Croatia today, in 14 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in 8 Croatian counties, in 7 cities and two other places, mostly in Zagreb (<10), Bili Brig in Pozega area (<10), Rijeka (<5), Porec (<5), and in Nova Kapela in Pozega area (<5).
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.