Feudal baron

Historically, feudal barons were the king's tenants-in-chief, that is to say men who held land by feudal tenure directly from the king as their sole overlord and were granted by him a legal jurisdiction (court baron) over their territory, the barony, comprising several manors. Such men, if not already noblemen, were ennobled by obtaining such tenure, and had thenceforth an obligation, upon summons by writ, to attend the king's peripatetic court, the earliest form of Parliament and the House of Lords. They thus formed the baronage, which later formed a large part of the peerage of England.