I wish the name had nothing to do with el clasico. I'm actually quite mad about it. It's so lame. Like others have said, it isn't classic, there hasn't ever been one. The vast majority of big derbies around the world don't have anything other than the most descriptive of names, the name doesn't give the game significance, it has that on it's own. And having it be el clasico but in Maori doesn't make it better. It should have just been the North Island Derby or Te Ika a Maui Derby until any other name developed naturally. The Te Ika Derby rolls off the tongue much easier than Te Matarohia, and I don't care if the shorter name literally means fish, everyone knows what it is meaning, and for fun you could even have some sort of fish trophy fashioned for it.
I'll ask this again, exactly how official is "the kiwi clasico"? A-League social media declared it official after the nix posted about it with that name on social media to market the game, but was this a unilateral decision by the nix marketing team? Was there consultation with Auckland FC? Did they think to ask fan groups?