Alison Weatherwax was the grandmother of Esmerelda and Lily and mother of Violet. She is first mentioned in The Discworld Companion which says little about her except that her death has not been recorded but was widely rumoured to have occurred; probable since she was born in Lancre 125 years before. The Weatherwaxes have strong magic lines in their genes, as a distant cousin was also a wizard and Arch-Chancellor of Unseen University. Alison Weatherwax was a notable Witch of Lancre but, for reasons unknown was estranged from her family and Lancre before Esmerelda knew her. In her later years she traveled extensively. In Carpe Jugulum, it was rumoured that she has "gone to the bad" but this prove unfounded and in fact she had put down the infamous Vampire, Count de Magpyr, for a very long nap in the Escrow area of Überwald over fifty years before. The Weatherwax family resemblance was so strong that when the Count was revived he initially thought Esmerelda was her grandmother. He remembered her with fondness in spite of her having cut off his head and driven a stake through his heart. Alison Weatherwax might take her name from the famous 16th-century witch, Alison Device.
Alison may have been named after the famous 16th-century witch, Alison Device.