Lady Margaery Tyrell is the third child and only daughter of Lord Mace Tyrell and Lady Alerie Tyrell. When she was young, her Grandmother, Lady Olenna Tyrell, arranged for a secret betrothal between her and the hidden Prince Jaegon Targaryen. Margaery was unaware of this, and she was confused for much of her life as her family continued to decline many matches for her.

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