Iolanthe Potter (née Peverell) is a character mentioned in JK Rowling's Harry Potter.
Iolanthe Peverell was the granddaughter of Ignotus Peverell and daughter of Ignotus' son. She inherited her Invisibility Cloak from her father. She later passed it down to her son, who began the family tradition of passing it down.
The cloak would eventually be inherited by Harry Potter.