What did Hiram king of Tyre call the twenty towns in Galilee that Solomon gave him?

Answer: The Land of Cabul

Hiram was not pleased when he inspected the towns and called them the Land of Cabul, the name they still had "to this day."

“King Solomon gave twenty towns in the land of Galilee to Hiram king of Tyre, who had supplied him with cedar and cypress logs and gold for his every desire.”— 1 Kings 9:11 (BSB)