|Planet of origin||Probably Earth|
|First appearance||"The Deep South" (2ACV12)|
Farnsworth's grandmother is the mother of either Farnsworth's father or Farnsworth's mother. Farnsworth owns two of her former possessions, the diamond filament tether (2ACV12) and the jar of a cranberry-raisin typhoon (6ACV04).
- She's probably deceased, considering the Professor is 174 years old, and that he talked about her in past tense in "The Deep South".
- It isn't confirmed if both grandmothers referenced are the same person.
Farnsworth: Bender, be careful. That's the ship's diamond filament tether. It's unbreakable.
Bender: Then why do I have to be careful?
Farnsworth: It belonged to my grandmother.
Farnsworth: I've got sunny, snow flurry, hail with onions, even my grandmother's cranberry-raisin typhoon.