Board Thread:Spoilers!/@comment-2153169-20170909025746/@comment-25926288-20171030204827

CoolDudeAl wrote: I think I figured it out:

Eloise is the mystery woman that will first show up in the Winter Finale. She will be Alice's love interest, WHook's daughter, and possibly the Guardian Rumple is looking for. She was kidnapped by the Witch, who should be Mother Gothel. Mother Gothel had previously captured Rapunzel, who is actually Lady Tremaine, but with the help of WHook, she escaped. She then had two daughters with Lord Tremaine, and after he died, married Cinderella's father. This all should work, but let me know if anything doesn't seem to fit. That's what I'm going with. (Well, not the part about the Guardian, though)

It could be that Hook-W rescued Rapunzel/Tremaine, then the Witch took his daughter as revenge. Hook-W did say "vengeful Witch", that seems like this could be the case.