The correct option is "lord"
Feudalism is the denomination of the predominant political system in Western Europe of the middle centuries of the Middle Ages and in Eastern Europe during the Modern Age, characterized by the decentralization of political power; to be based on the diffusion of power from the top, to the base where local power was exercised effectively with great autonomy or independence by an aristocracy, called nobility, whose titles derived from governors of the Carolingian empire (Dukes, Marquises, counts) or they had another origin (barons, gentlemen, etc.).