Prekmurian and not Prekmurje 

Needless and blunt stretch: not formal the Prekmurje or Prekmurian name.
Wherefore Resian the language of Résia?
The Prekmurians also much love the Prekmurian name and not the Prekmurje
Prekmurian correct grammatical idiom
Marko Jesenšek the rector of Maribor University evenly use the Prekmurje, Prekmurian
The meta-wiki also accept to the Prekmurian and hopefully make Prekmurian wikipedia. talk