Protector
PROTECT'OR, noun One that defends or shields from injury, evil or oppression; a defender; a guardian. The king or sovereign is, or ought to be, the protector of the nation; the husband is the protector of his wife, and the father of his children.
1. In England, one who formerly had the care of the kingdom during the king's minority; a regent. Cromwell assumed the title of lord protector
2. In catholic countries, every nation and every religious order has a protector residing at Rome. He is a cardinal, and called cardinal protector