I'm not crazy about it as a fn - it sounds kind of harsh to me, maybe because of its closeness to "blight." But I have seen it used well as a mn. Of your picks,
Aurelia Blythe is the nicest, I think.
The B sound in
Annabel Blythe doesn't bother me, but I think a more ornate name than
Annabel or
Katherine works better with
Blythe.
Aurelia is like that. Someone else posted a combo of
Cordelia Blythe not too long ago (maybe that was you?) - that was very nice also.