In Egypt, to which officer of Pharaoh was Joseph sold?

Answer: Potiphar

Potiphar, an officer of Pharaoh and captain of the guard, bought Joseph from the Ishmaelites who had taken him to Egypt.

“Meanwhile, the Midianites sold Joseph in Egypt to Potiphar, an officer of Pharaoh and captain of the guard. Meanwhile, Joseph had been taken down to Egypt, where an Egyptian named Potiphar, an officer of Pharaoh and captain of the guard, bought him from the Ishmaelites who had taken him there.”— Genesis 37:36, 39:1 (BSB)