Sure, you can call her whatever you like. I'm just saying, I'm going to keep calling her the name that doesn't register as The Wild to my brain, because that sounds less like a name and more like a weird Tarot arcana or a Furi boss . Whatever anyone else calls a character is neither my business nor my place to say.
Hilariously, I get a definite feeling if they had just put the name all together in a single word, Labrava, the adjective would literally never have registered in my brain and I'd have assumed it was just a silly JRPG name?
And yeah, I'm with Kato on the whole "eh, if I like the fan variation more, officialness can go hang".