Eh. It is a nickname based of a syllable that is actually a schwa. I don't think it works very well.
I do like
May for it
a lot though. And I am surprised
Minnie has not been suggested, though that would work better for
Madelyn probably.
Alice Katharina Hermione is fine. It is very healthy. The flow doesn't bowl me over or anything, nor does it bowl me over the other way, but it is fine.