|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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Elladora Ketteridge (1656 - 1729) was the first witch to discover the properties of Gillyweed, although Beaumont Majoribanks was credited with it about a century later. She nearly suffocated after eating the plant, but saved herself by sticking her head into a bucket of water.
- Harry Potter and the Philosopher's Stone (video game) (Appears on a Famous Wizard Card)
- Harry Potter and the Chamber of Secrets (video game) (Appears on a Famous Wizard Card)
- Pottermore (Appears on a Famous Wizard Card)