Fact Snacks!

spongebob-squarepants-was-originally-called

SpongeBob SquarePants was originally called Spongeboy. 

That name wasn’t available because it was already copy- righted by a mop company, so creator Stephen Hillenburg had to think of something else.

Eventually, he decided on SpongeBob, SquarePants popped into his head as a last name, and he came up with the other characters from there. 

(Source)