In Croatia, Mumeljaš families are Croats (from Sveti Ivan Zelina ). In the past century, relatively most of Croatian residents bearing this family name were born in Sveti Ivan Zelina.
Prevalence
Only a few people with faimily name Mumeljaš live in Croatia today, in one household only. They are located in only one small Croatian place, in Krecaves (<5).
Outside Croatia
Family name Mumeljaš is present in this form only in Croatia.