Conversation so far:
Is Stephen Hillenburg married?
He married Karen Umland
What does Karen Umland do?
a Southern Californian chef
Do Stephen Hillenburg and Karen Umland have kids?
The couple's first and only child, son Clay
What did Stephen Hillenburg do with his free time?
Make animations
Did Stephen Hillenburg do anything else with his free time besides make animations?
He was an ocean freak.
Did Stephen Hillenburg stick to himself mostly?
He was also known for his private nature.
Any references to spongebob in the Stephen Hillenburg article?
He is best remembered for creating the Nickelodeon animated television series SpongeBob SquarePants which he also directed, produced, and wrote.
What was Stephen Hillenburg diagnosed with?
Hillenburg disclosed to Variety magazine in March 2017 that he had been diagnosed with amyotrophic lateral sclerosis
Did Stephen Hillenburg recover?
Hillenburg died at his home on November 26, 2018, at the age of 57

Question: Did he have any friends?
Self-contained rewrite: Did Hillenburg have any friends?