I won't say since it would give away my identity, but my middle name is my old maiden name. It used to be Kristine for no particular reason but I didn't like that, so when I married, I got rid of it.
Marie - I have no idea why.
My best friend growing up was Ann, she didn't have a middle name. She used to say she didn't have a first name because she was a middle name.Ann - the go to middle name.