Hester Hawthorne
From Tardis Wiki, the free Doctor Who reference
Hester was the grandmother of Olive Hawthorne (PROSE: The Poppet) and Poppy Hawthorne. Her sister was Lobelia. (PROSE: The Inheritance)
She lived in Devil's End. She died when the girls were young but before she did, she gave Olive a necklace with strange symbols on it. (HOMEVID: The Inheritance)