English feudal barony in the context of "FitzGerald dynasty"

An overlord in the English feudal system was a lord of a manor who had subinfeudated a particular manor, estate or fee, to a tenant. The tenant thenceforth owed to the overlord one of a variety of services, usually military service or serjeanty, depending on which form of tenure (i.e. feudal tenancy contract) the estate was held under. The highest overlord of all, or lord paramount, was the monarch, who due to his ancestor William the Conqueror's personal conquest of the Kingdom of England, owned by inheritance from him all the land in England under allodial title and had no superior overlord, "holding from God and his sword", although certain monarchs, notably King John (1199–1216) purported to grant the Kingdom of England to Pope Innocent III, who would thus have become overlord to English monarchs.

A paramount lord may then be seen to occupy the apex of the feudal pyramid, or the root of the feudal tree, and such allodial title is also termed "radical title" (from Latin radix, root), "ultimate title" and "final title". William the Conqueror immediately set about granting tenancies on his newly won lands, in accordance with feudal principles. The monarch's immediate tenants were the tenants-in-chief, usually military magnates, who held the highest status in feudal society below the monarch. The tenants-in-chief usually held multiple manors or other estates from the monarch, often as feudal barons (or "barons by tenure") who owed their royal overlord an enhanced and onerous form of military service, and subinfeudated most to tenants, generally their own knights or military followers, keeping only a few in demesne. This created a mesne lord – tenant relationship. The knights in turn subinfeudated to their own tenants, creating a further subsidiary mesne lord – tenant relationship. Over the centuries for any single estate the process was in practice repeated numerous times.

The First Barons' War (1215–1217) was a civil war in the Kingdom of England in which a group of rebellious major landowners (commonly referred to as barons) led by Robert Fitzwalter waged war against King John. The conflict resulted from King John's disastrous wars against King Philip II of France which led to the collapse of the Angevin Empire, and John's subsequent refusal to accept and abide by Magna Carta, which John had sealed on 15 June 1215.

The rebellious barons, faced with an uncompromising king, turned to King Philip's son Louis, who in 1216 sailed to England with an army despite his father's and the pope's disapprovals. Louis captured Winchester and soon controlled over half of the English kingdom. He was proclaimed "King of England" in London by the barons, although he was never actually crowned.

A lord of the manor, in Anglo-Saxon England and Norman England, is the landholder of a rural estate. The titles date to the English feudal (specifically baronial) system. The lord enjoyed manorial rights (the rights to establish and occupy a residence, known as the manor house and demesne) as well as seignory, the right to grant or draw benefit from the estate (for example, as a landlord). The title is not a peerage or title of upper nobility (although the holder could also be a peer) but was a relationship to land and how it could be used and those living on the land (tenants) may be deployed, and the broad estate and its inhabitants administered. The title continues in modern England and Wales as a legally recognised form of property that can be held independently of its historical rights. It may belong entirely to one person or be a moiety shared with other people. The title is known as Breyr in Welsh.

In the British Crown Dependencies of Jersey and Guernsey the equivalent title is Seigneur.

Robert Fitzwalter (died 9 December 1235) was one of the leaders of the baronial opposition against King John, and one of the twenty-five sureties of Magna Carta. He was feudal baron of Little Dunmow, Essex and constable of Baynard's Castle, in London, to which was annexed the hereditary office of castellan and chief knight banneret of the City of London. Part of the official aristocracy created by Henry I and Henry II, he served John in the wars in Normandy, in which he was taken prisoner by King Philip II of France and forced to pay a heavy ransom.

Fitzwalter was implicated in the baronial conspiracy of 1212. According to his own statement the king had attempted to seduce his eldest daughter, but Robert's account of his grievances varied from time to time. The truth seems to be that he was irritated by the suspicion with which John regarded the new baronage. Fitzwalter escaped a trial by fleeing to France. He was outlawed, but returned under a special amnesty after John's reconciliation with the pope.

The Rape of Bramber (also known as Bramber Rape) is one of the rapes, the traditional sub-divisions unique to the historic county of Sussex in England. It is the smallest Sussex rape by area. Bramber is a former barony whose original seat was the castle of Bramber and its village, overlooking the river Adur.

Clare Castle is a high-mounted ruinous medieval castle in the parish and former manor of Clare in Suffolk, England, anciently the caput of a feudal barony. It was built shortly after the Norman Conquest of England in 1066 by Richard Fitz Gilbert, having high motte and bailey and later improved in stone. In the 14th century it was the seat of Elizabeth de Clare, one of the wealthiest women in England, who maintained a substantial household there. The castle passed into the hands of the Crown and by 1600 was disused. The ruins are an unusually tall earthen motte surmounted by tall remnants of a wall and of the round tower, with large grassland or near-rubble gaps on several of their sides. It was damaged by an alternate line of the Great Eastern Railway in 1867, the rails of which have been removed.

The remains are a scheduled monument and a Grade II* listed building. They form the centrepiece of a public park.

The Honour of Clare was a medieval English feudal barony centred on the town of Clare in Suffolk. It was established following the Norman Conquest and became one of the most important honours in East Anglia. The caput baroniae, or administrative centre, of the honour was Clare Castle, a motte-and-bailey structure later rebuilt in stone.

The honour was originally granted after the Revolt of the Earls in 1075 to Richard Fitz Gilbert, a companion of William the Conqueror, who as Chief Justiciar had played a major part in suppressing the rebellion. He took the name "de Clare" from the estate. Originally, it consisted of lands in Essex and Suffolk that had previously belonged to Wihtgar Ælfricsson, son of Ælfric, an Essex thegn, and to Phin the Dane. During the twelfth century, the Honour acquired valuable manors in Norfolk.