A Song for...who?

[yuki_unmei]

I'm sorry if there's already a thread like this!! I couldn't find one.

I've read mixed things about some of Ayu's songs being written about certain people.

Such as:
A Song for xx (for her mother or father?)
Teddy Bear (for father?)
Memorial Address (for father or grandma?)
MY ALL (for friend who died?)
Untitled ~for her~ (for friend who died or grandma?)

As i said, i've seen different theories to all these songs, and I'm wondering if there's any actual interviews / articles / translations where Ayu talks about these songs or what was written for who?