When King David's army defeated the Edomites, Hadad, a prince of Edom, escaped to Egypt. There "Hadad found great favor in the sight of the Pharaoh" (1 Kings 11:19), who gave him both land and a house, allowance for food, and the hand of his wife's sister in marriage. After King David died, Hadad became an enemy of King Solomon.
The name Hadad means "thunderer."
Next person in the Bible: Hadadezer