This name is so gorgeous! I love the meaning, it gives me an image of a girl who is wise beyond her years and is way more knowledgeable than she leads on. Surprised this one isn't more popular with how popular a name like Maya (which I also find pretty!) is!
According to https://en.wiktionary.org/wiki/Maiara#Portuguese, the name is derived from Old Tupi "ma'e îara", which apparently translates to “the lady of riches”. Their source: NAVARRO, E. A. Dicionário de tupi antigo: a língua indígena clássica do Brasil. São Paulo. Global. 2013.Apparently pronounced /majˈa.ɾɐ/