Rahab ♀, was a prostitute from Jericho.
Rahab saved the Israelite spies who were sent by Joshua to spy on Jericho. When the king of Jericho was looking for them, she hid them and told them they had already left the city. The Israelites then promised her to spare the lives of her family.
She was then indeed saved when the Israelites stormed the city.