Remember the Temple of Creation from MNOLG II and how the Po-Koronans made such a big deal out of Creation as a principle? Since all that was in the Motara desert, I think it'd actually make a lot of sense for Motara to mean Creation. I'm voting Motara. And Tiro, because the Tiro Canyon was nearby. I don't know about the non-canon names. Do any of them mean anything in Maori or something? I like Nuvau and Arka for their aforementioned connections to Nuva and Artakha, but I'm open to any others I can find rationale behind.