Board Thread:Speculation House/@comment-24.99.68.250-20160805152545/@comment-24573226-20160805152904

Well, Zelena was made up by the Once Upon A Time writers.

Gregory Maguire named the Wicked Witch Elphaba after L. F. Baum, Oz's author.

Salem is a mystery. She might not even have been named by parents who knows? And of course people could name their kid Salem and probably have.

But yes, there is a running, unconfirmed theory about the Wizard of Oz allusions.