Board Thread:Spoilers!/@comment-27060727-20160929050506/@comment-25926288-20161115215207

Jack and Jill could be either as they represent either siblings or a King and Queen (because of the mention of a crown). Chances are they are neither in Once's book.

This would be cool is they were and this was decades or so back, especially if the Black Fairy is around causing havoc. It must be before Tink is banished (so before Leopold's death), I'd hope.