I believe Xion is connected to Kairi, no doubt.
But being her Nobody?
Hmm, iono.
Oh, and the Organization's member's names don't exactly have to be an anagram of their original name.
For example: Xemnas=Ansem X
Was he really Ansem? No. He was Xehanort or possibly even Terra.
So it doesn't HAVE to be.
But of course, Xemnas could've made his name an exception xD
But being her Nobody?
Hmm, iono.
Oh, and the Organization's member's names don't exactly have to be an anagram of their original name.
For example: Xemnas=Ansem X
Was he really Ansem? No. He was Xehanort or possibly even Terra.
So it doesn't HAVE to be.
But of course, Xemnas could've made his name an exception xD