Miley. If you say it, it's not too bad. It's no worse than
Kylie or
Rylie. A little trendy, and associated with one person, but I think it may have staying power, just because of its similarity to
Kylie and
Rylie (that is, it's not associated with one person, like say if you named a child
Madonna or
Elvis).
I would assume the Hawaiian
Maile is pronounced /mah EE lay/-- you pronounce every vowel in Hawaiian I think.
Aodhan is actually not pronounced like
Aidan, though people often use it as an alt spelling. It's more like /AY awn/ or /UY awn/ (the "d" is silent when followed by an "h", or sometimes pronounced like a "yuh").