From A Wiki of Ice and Fire
|Died||In 130 AC, Bitterbridge|
|Book||Fire & Blood (mentioned)|
Willow Pound-Stone was a washerwoman in the town of Bitterbridge during the Dance of the Dragons.
According to Mushroom, Willow weighed thirty stone (420 pounds), and was simpleminded and half-mad. She had earned her name pounding clothes clean in the Mander.
In The Testimony of Mushroom, the dwarf asserts it was Willow who killed Prince Maelor Targaryen by clutching him so tightly that she broke his back and crushed him to death.
Afterward, Willow was hanged from the center span of the old bridge at the command of Lady Caswell.