We know that it was an earlier Princess Zelda whom the magician cast the spell on some centuries prior to The Adventure of Link (meaning there's now two Zeldas awake and running around by the end of that game), but we still don't know which one it was, specifically.

Very likely it was a Princess Zelda who lived at some point around or after the events of Twilight Princess and A Link to the Past, and whose body got moved northward to the new North Castle when Hyrule's seat of government relocated prior to the NES games.

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