Miley
Cyrus, the daughter of
Billy Ray Cyrus, is the girl who plays
Hannah Montana on Disney. Her real name's not Miley, that's a contraction of the nn Smiley her dad called her. Her real name is
Destiny Hope.
Since she's the only Miley I've known of with that spelling, and I know whence it came, I don't think of it as being related to Mylee, other than merely being its homonym. Same with
Maile, which I would have thought ended in long A, as you said.