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|SpongeBob's Great Grandmother|
Plankton pretending to be SpongeBob's Great Grandmother
|Children:||Grandpa SquarePants, Grandpa BubbleBottom, Grandma SquarePants, or Grandma BubbleBottom|
|Parents:||SpongeBob's Great Great Grandmother (possible mother)|
|Grandchildren:||Harold SquarePants, Captain Blue SquarePants, and Sherm SquarePants (possible grandsons)|
Margaret SquarePants (possible granddaughter)
SpongeBob SquarePants (great grandson)
Stanley S. SquarePants, Todd SquarePants, Larry, and BlackJack (possible great grandsons)
|Descendants:||Unnamed Great Great Great Grandson|
|Other relatives:||Grandpa SquarePants or Grandpa BubbleBottom (possible son-in-law)|
Grandma SquarePants or Grandma BubbleBottom (possible daughter-in-law)
|Appearance:||"Gramma's Secret Recipe" (Plankton portraying her)|
|List of characters|
SpongeBob's Great Grandmother (possibly Great Grandma SquarePants or Great Grandma BubbleBottom), referred to as "great-grammyma," is one of four possible great grandmothers of SpongeBob SquarePants. Sheldon J. Plankton portrays her in "Gramma's Secret Recipe."
She may have been born to SpongeBob's Great Great Grandmother.
She likely died during SpongeBob's young childhood because in "Gramma's Secret Recipe," he tells Plankton, who is pretending to be her, while tearing up, "I'm so glad you came back..."