Sheldon Squarepants Krabs

Sheldon SquarePants Krabs is the son of Mr Krabs and secondary

son of SpongeBob his backstory isn't revealed until hislast appearance(not his last yet).

Origin
Sheldon was found as a baby in the middle of the ocean beside his dead mother by Mr Krabs whom he took in and named him-Sheldon. The next morning while Sheldon was still a baby he showed SpongeBob at work SpongeBob thought he was "The cutest thing" and also decided to take him in as his secondary adoptive father. Sheldon grew to be an 11 year old boy he fit in pretty quickly at school

and was really smart too.