Maya I would pn May-A, I think of ancient Mayan culture & the wonderful Maya Angelou.
Maia could be pn May-a or My-a and consider it the more anglicised version of Maia, but don't know why that is, maybe simply because 'ia' names are more commonly found in the UK. Maia is also the heroine of one of my favourite children's books, Eva Ibbotson's 'Journey to the River Sea'.