His last name is Krabs.
Squarepants.
Plankton is his last name. His full name is Sheldon J. Plankton.
Patrick star!
Patrick Star .
Well if your looking for the answer, you probably dont know ANYTHING about spongebob because theres the easiest answer in the world, and if you dont know you are probably [*ahem*] not very spongebob fan-type. So heres the answer First name: Spongebob Last Name: SquarePants [Middle name not required] Okay bye !
Sandy from spongebob squarepants last name is Cheeks so her name is Sandy Cheeks. God Bless Ya!! Root-Beer-Girl
SpongeBob SquarePants' 1st name is SpongeBob.
First Name: Spongebob Surname: Squarepants [Middle name not required]
Mrs. PuffThey never actually say her first name.
SpongeBob the last Stan is 30 min. long
SpongeBob's Last Stand was created on 2010-04-22.