Because of the red stew, what other name was Esau called?

Answer: Edom

Esau said, "Let me eat some of that red stew, for I am famished." That is why he was also called Edom.

“He said to Jacob, “Let me eat some of that red stew, for I am famished.” (That is why he was also called Edom.)”— Genesis 25:30 (BSB)