In Croatia, Potocnjak families are Croats (from Zadar ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar.
Prevalence
Only a few people with faimily name Potocnjak live in Croatia today, in one household only. They are located in only one small Croatian place, in Razanac in Nin area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over fifty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.