Well, honey, SpongeBob's grandma's name is Grandma SquarePants. Just like how his last name is SquarePants because he lives in a pineapple under the sea and wears square pants. It's all in the family, darling.
Mystery lol!
Mystery
PoopScooper
BUTHOLECILIVAN
Harold Squarepants
Jr.
The goo-la-goon
Black Jack
Armor Abs.
ethel
her name is Lowis SquarePants(:0 or mrs.SQUAREPANTS
His name is Larry the Lobster he is Spongebobs lifegaurd friend